diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cd6aec2f99..c45a815d7f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -137,7 +137,7 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, 'beta') && !contains(github.ref, 'alpha')
         run: |
           export ORG_GRADLE_PROJECT_signingKey=`echo ${{ secrets.GPG_PRIVATE_KEY }} | base64 -d`
-          ./gradlew --no-daemon -Dorg.gradle.internal.publish.checksums.insecure=true --parallel -Pversion=$VERSION -PenableJavaFrontend=true  -PenableCXXFrontend=true -PenableGoFrontend=true -PenablePythonFrontend=true -PenableLLVMFrontend=true -PenableTypeScriptFrontend=true publishToSonatype closeSonatypeStagingRepository
+          ./gradlew --no-daemon -Dorg.gradle.internal.publish.checksums.insecure=true --parallel -Pversion=$VERSION -PenableJavaFrontend=true  -PenableCXXFrontend=true -PenableGoFrontend=true -PenablePythonFrontend=true -PenableLLVMFrontend=true -PenableTypeScriptFrontend=true -PenableRubyFrontend=true publishToSonatype closeSonatypeStagingRepository
         env:
           VERSION: ${{ env.version }}
           ORG_GRADLE_PROJECT_signingPassword: ${{ secrets.GPG_PASSWORD }}
diff --git a/build.gradle.kts b/build.gradle.kts
index baace361f8..a0907183aa 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -144,3 +144,9 @@ val enableTypeScriptFrontend: Boolean by extra {
     enableTypeScriptFrontend.toBoolean()
 }
 project.logger.lifecycle("TypeScript frontend is ${if (enableTypeScriptFrontend) "enabled" else "disabled"}")
+
+val enableRubyFrontend: Boolean by extra {
+    val enableRubyFrontend: String? by project
+    enableRubyFrontend.toBoolean()
+}
+project.logger.lifecycle("Ruby frontend is ${if (enableRubyFrontend) "enabled" else "disabled"}")
diff --git a/buildSrc/src/main/kotlin/cpg.frontend-dependency-conventions.gradle.kts b/buildSrc/src/main/kotlin/cpg.frontend-dependency-conventions.gradle.kts
index fc5c2914f6..f889db5192 100644
--- a/buildSrc/src/main/kotlin/cpg.frontend-dependency-conventions.gradle.kts
+++ b/buildSrc/src/main/kotlin/cpg.frontend-dependency-conventions.gradle.kts
@@ -9,6 +9,7 @@ val enableGoFrontend: Boolean by rootProject.extra
 val enablePythonFrontend: Boolean by rootProject.extra
 val enableLLVMFrontend: Boolean by rootProject.extra
 val enableTypeScriptFrontend: Boolean by rootProject.extra
+val enableRubyFrontend: Boolean by rootProject.extra
 
 dependencies {
     if (enableJavaFrontend) api(project(":cpg-language-java"))
@@ -17,4 +18,5 @@ dependencies {
     if (enablePythonFrontend) api(project(":cpg-language-python"))
     if (enableLLVMFrontend) api(project(":cpg-language-llvm"))
     if (enableTypeScriptFrontend) api(project(":cpg-language-typescript"))
+    if (enableRubyFrontend) api(project(":cpg-language-ruby"))
 }
diff --git a/configure_frontends.sh b/configure_frontends.sh
index d4d02998e5..7304b0b04c 100755
--- a/configure_frontends.sh
+++ b/configure_frontends.sh
@@ -56,3 +56,5 @@ answerLLVM=$(ask "Do you want to enable the LLVM frontend? (currently $(getPrope
 setProperty "enableLLVMFrontend" $answerLLVM
 answerTypescript=$(ask "Do you want to enable the TypeScript frontend? (currently $(getProperty "enableTypeScriptFrontend"))")
 setProperty "enableTypeScriptFrontend" $answerTypescript
+answerRuby=$(ask "Do you want to enable the Ruby frontend? (currently $(getProperty "enableRubyFrontend"))")
+setProperty "enableRubyFrontend" $answerRuby
diff --git a/cpg-language-ruby/build.gradle.kts b/cpg-language-ruby/build.gradle.kts
new file mode 100644
index 0000000000..3165b826d9
--- /dev/null
+++ b/cpg-language-ruby/build.gradle.kts
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+import com.github.gradle.node.npm.task.NpmTask
+
+plugins {
+    id("cpg.frontend-conventions")
+    alias(libs.plugins.node)
+}
+
+publishing {
+    publications {
+        named<MavenPublication>("cpg-language-ruby") {
+            pom {
+                artifactId = "cpg-language-ruby"
+                name.set("Code Property Graph - Ruby")
+                description.set("A Ruby language frontend for the CPG")
+            }
+        }
+    }
+}
+
+dependencies {
+    implementation("org.jruby:jruby-core:9.4.3.0")
+}
\ No newline at end of file
diff --git a/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/DeclarationHandler.kt b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/DeclarationHandler.kt
new file mode 100644
index 0000000000..4070dbdeeb
--- /dev/null
+++ b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/DeclarationHandler.kt
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+package de.fraunhofer.aisec.cpg.frontends.ruby
+
+import de.fraunhofer.aisec.cpg.graph.declarations.Declaration
+import de.fraunhofer.aisec.cpg.graph.declarations.FunctionDeclaration
+import de.fraunhofer.aisec.cpg.graph.declarations.ProblemDeclaration
+import de.fraunhofer.aisec.cpg.graph.newFunctionDeclaration
+import de.fraunhofer.aisec.cpg.graph.newParameterDeclaration
+import de.fraunhofer.aisec.cpg.graph.newReturnStatement
+import de.fraunhofer.aisec.cpg.graph.statements.ReturnStatement
+import de.fraunhofer.aisec.cpg.graph.statements.expressions.Block
+import org.jruby.ast.ArgumentNode
+import org.jruby.ast.DefnNode
+import org.jruby.ast.Node
+
+class DeclarationHandler(lang: RubyLanguageFrontend) :
+    RubyHandler<Declaration, Node>({ ProblemDeclaration() }, lang) {
+
+    override fun handleNode(node: Node): Declaration {
+        return when (node) {
+            is ArgumentNode -> handleArgumentNode(node)
+            is DefnNode -> handleDefnNode(node)
+            else -> handleNotSupported(node, node::class.simpleName ?: "")
+        }
+    }
+
+    private fun handleArgumentNode(node: ArgumentNode): Declaration {
+        return newParameterDeclaration(node.name.idString(), variadic = false)
+    }
+
+    private fun handleDefnNode(node: DefnNode): FunctionDeclaration {
+        val func = newFunctionDeclaration(node.name.idString())
+
+        frontend.scopeManager.enterScope(func)
+
+        for (arg in node.argsNode.args) {
+            frontend.scopeManager.addDeclaration(this.handle(arg))
+        }
+
+        val body = frontend.statementHandler.handle(node.bodyNode)
+        if (body is Block) {
+            // get the last statement
+            val lastStatement = body.statements.lastOrNull()
+
+            // add an implicit return statement, if there is no return statement
+            if (lastStatement !is ReturnStatement) {
+                val returnStatement = newReturnStatement("return")
+                returnStatement.isImplicit = true
+                body += returnStatement
+
+                // TODO: Ruby returns the last expression, if there is no explicit return
+            }
+        }
+        func.body = body
+
+        frontend.scopeManager.leaveScope(func)
+
+        return func
+    }
+}
diff --git a/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/ExpressionHandler.kt b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/ExpressionHandler.kt
new file mode 100644
index 0000000000..4764154728
--- /dev/null
+++ b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/ExpressionHandler.kt
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+package de.fraunhofer.aisec.cpg.frontends.ruby
+
+import de.fraunhofer.aisec.cpg.graph.*
+import de.fraunhofer.aisec.cpg.graph.statements.expressions.*
+import org.jruby.ast.*
+import org.jruby.ast.Node
+import org.jruby.ast.types.INameNode
+import org.jruby.ast.visitor.OperatorCallNode
+
+class ExpressionHandler(lang: RubyLanguageFrontend) :
+    RubyHandler<Expression, Node>({ ProblemExpression() }, lang) {
+
+    override fun handleNode(node: Node): Expression {
+        return when (node) {
+            is OperatorCallNode -> handleOperatorCallNode(node)
+            is CallNode -> handleCallNode(node)
+            is FCallNode -> handleFCallNode(node)
+            is IterNode -> handleIterNode(node)
+            is StrNode -> handleStrNode(node)
+            is FixnumNode -> handleFixnumNode(node)
+            is FloatNode -> handleFloatNode(node)
+            is DVarNode -> handleINameNode(node)
+            is LocalVarNode -> handleINameNode(node)
+            is DAsgnNode -> handleDAsgnNode(node)
+            is LocalAsgnNode -> handleLocalAsgnNode(node)
+            else -> handleNotSupported(node, node::class.simpleName ?: "")
+        }
+    }
+
+    private fun handleOperatorCallNode(node: OperatorCallNode): BinaryOperator {
+        val binOp = newBinaryOperator(node.name.idString())
+
+        (this.handle(node.receiverNode) as? Expression)?.let { binOp.lhs = it }
+
+        // Always seems to be an array?
+        val list = node.argsNode as ArrayNode
+        (this.handle(list.get(0)) as? Expression)?.let { binOp.rhs = it }
+
+        return binOp
+    }
+
+    private fun handleINameNode(node: INameNode): Reference {
+        return newReference(node.name.idString())
+    }
+
+    private fun handleIterNode(node: IterNode): LambdaExpression {
+        // a complete hack, to handle iter nodes, which is sort of a lambda expression
+        // so we create an anonymous function declaration out of the bodyNode and varNode
+        val func = newFunctionDeclaration("", frontend.codeOf(node))
+
+        frontend.scopeManager.enterScope(func)
+
+        for (arg in node.argsNode.args) {
+            val param = frontend.declarationHandler.handle(arg)
+            frontend.scopeManager.addDeclaration(param)
+        }
+
+        func.body = frontend.statementHandler.handle(node.bodyNode)
+
+        frontend.scopeManager.leaveScope(func)
+
+        val lambda = newLambdaExpression()
+        lambda.function = func
+
+        return lambda
+    }
+
+    private fun handleDAsgnNode(node: DAsgnNode): AssignExpression {
+        val assign = newAssignExpression("=")
+
+        // we need to build a reference out of the assignment node itself for our LHS
+        assign.lhs = listOf(handleINameNode(node))
+        assign.rhs = listOf(this.handle(node.valueNode))
+
+        return assign
+    }
+
+    private fun handleLocalAsgnNode(node: LocalAsgnNode): AssignExpression {
+        val assign = newAssignExpression("=")
+
+        // we need to build a reference out of the assignment node itself for our LHS
+        assign.lhs = listOf(handleINameNode(node))
+        assign.rhs = listOf(this.handle(node.valueNode))
+
+        return assign
+    }
+
+    private fun handleCallNode(node: CallNode): Expression {
+        val base =
+            handle(node.receiverNode) as? Expression
+                ?: return ProblemExpression("could not parse base")
+        val callee = newMemberExpression(node.name.asJavaString(), base)
+
+        val mce = newMemberCallExpression(callee, false)
+
+        for (arg in node.argsNode?.childNodes() ?: emptyList()) {
+            mce.addArgument(handle(arg))
+        }
+
+        // add the iterNode as last argument
+        node.iterNode?.let { mce.addArgument(handle(it)) }
+
+        return mce
+    }
+
+    private fun handleFCallNode(node: FCallNode): Expression {
+        val callee = handleINameNode(node)
+
+        val call = newCallExpression(callee)
+
+        for (arg in node.argsNode?.childNodes() ?: emptyList()) {
+            call.addArgument(handle(arg))
+        }
+
+        // add the iterNode as last argument
+        node.iterNode?.let { call.addArgument(handle(it)) }
+
+        return call
+    }
+
+    private fun handleStrNode(node: StrNode): Literal<String> {
+        return newLiteral(String(node.value.bytes()), primitiveType("String"))
+    }
+
+    private fun handleFixnumNode(node: FixnumNode): Literal<Long> {
+        return newLiteral(node.value, primitiveType("Integer"))
+    }
+
+    private fun handleFloatNode(node: FloatNode): Literal<Double> {
+        return newLiteral(node.value, primitiveType("Float"))
+    }
+}
diff --git a/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyHandler.kt b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyHandler.kt
new file mode 100644
index 0000000000..5c8ba077b0
--- /dev/null
+++ b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyHandler.kt
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+package de.fraunhofer.aisec.cpg.frontends.ruby
+
+import de.fraunhofer.aisec.cpg.frontends.Handler
+import de.fraunhofer.aisec.cpg.graph.Node
+import de.fraunhofer.aisec.cpg.graph.ProblemNode
+import de.fraunhofer.aisec.cpg.helpers.Util
+
+abstract class RubyHandler<ResultNode : Node, HandlerNode : org.jruby.ast.Node>(
+    configConstructor: () -> ResultNode,
+    frontend: RubyLanguageFrontend
+) : Handler<ResultNode, HandlerNode, RubyLanguageFrontend>(configConstructor, frontend) {
+    /**
+     * We intentionally override the logic of [Handler.handle] because we do not want the map-based
+     * logic, but rather want to make use of the Kotlin-when syntax.
+     */
+    override fun handle(ctx: HandlerNode): ResultNode {
+        val node = handleNode(ctx)
+
+        // The language frontend might set a location, which we should respect. Otherwise, we will
+        // set the location here.
+        if (node.location == null) {
+            frontend.setCodeAndLocation(node, ctx)
+        }
+
+        frontend.setComment(node, ctx)
+        frontend.process(ctx, node)
+
+        lastNode = node
+
+        return node
+    }
+
+    abstract fun handleNode(node: HandlerNode): ResultNode
+
+    /**
+     * This function should be called by classes that derive from [RubyHandler] to denote, that the
+     * supplied node (type) is not supported.
+     */
+    protected fun handleNotSupported(node: HandlerNode, name: String): ResultNode {
+        Util.errorWithFileLocation(
+            frontend,
+            node,
+            log,
+            "Parsing of type $name is not supported (yet)"
+        )
+
+        val cpgNode = this.configConstructor.get()
+        if (cpgNode is ProblemNode) {
+            cpgNode.problem = "Parsing of type $name is not supported (yet)"
+        }
+
+        return cpgNode
+    }
+}
diff --git a/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguage.kt b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguage.kt
new file mode 100644
index 0000000000..93969276d9
--- /dev/null
+++ b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguage.kt
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+package de.fraunhofer.aisec.cpg.frontends.ruby
+
+import de.fraunhofer.aisec.cpg.ScopeManager
+import de.fraunhofer.aisec.cpg.frontends.*
+import de.fraunhofer.aisec.cpg.graph.declarations.RecordDeclaration
+import de.fraunhofer.aisec.cpg.graph.statements.expressions.MemberExpression
+import de.fraunhofer.aisec.cpg.graph.types.*
+import kotlin.reflect.KClass
+
+/** The Ruby Language */
+class RubyLanguage() :
+    Language<RubyLanguageFrontend>(),
+    HasDefaultArguments,
+    HasClasses,
+    HasSuperClasses,
+    HasShortCircuitOperators {
+    override val fileExtensions = listOf("rb")
+    override val namespaceDelimiter = "::"
+    @Transient override val frontend: KClass<out RubyLanguageFrontend> = RubyLanguageFrontend::class
+    override val superClassKeyword = "super"
+
+    override val conjunctiveOperators = listOf("&&")
+    override val disjunctiveOperators = listOf("||")
+
+    @Transient
+    /** See [The RubySpec](https://github.com/ruby/spec) */
+    override val builtInTypes =
+        mapOf(
+            // The bit width of the Integer type in Ruby is only limited by your memory
+            "Integer" to IntegerType("Integer", null, this, NumericType.Modifier.SIGNED),
+            "Float" to FloatingPointType("Float", 64, this, NumericType.Modifier.SIGNED),
+            "String" to StringType("String", this),
+            // The bit width of Booleans is not defined in the specification and
+            // implementation-dependant
+            "Boolean" to BooleanType("Boolean", null, this, NumericType.Modifier.NOT_APPLICABLE)
+        )
+
+    override val compoundAssignmentOperators =
+        setOf(
+            "+=", // Addition assignment
+            "-=", // Subtraction assignment
+            "*=", // Multiplication assignment
+            "/=", // Division assignment
+            "%=", // Modulo assignment
+            "**=", // Exponentiation assignment
+            "<<=", // Left shift assignment
+            ">>=", // Right shift assignment
+            "&=", // Bitwise AND assignment
+            "|=", // Bitwise OR assignment
+            "^=" // Bitwise XOR assignment
+        )
+
+    override fun handleSuperCall(
+        callee: MemberExpression,
+        curClass: RecordDeclaration,
+        scopeManager: ScopeManager
+    ): Boolean {
+        TODO("Not yet implemented")
+    }
+}
diff --git a/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguageFrontend.kt b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguageFrontend.kt
new file mode 100644
index 0000000000..22bc8748f7
--- /dev/null
+++ b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguageFrontend.kt
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+package de.fraunhofer.aisec.cpg.frontends.ruby
+
+import de.fraunhofer.aisec.cpg.TranslationContext
+import de.fraunhofer.aisec.cpg.frontends.LanguageFrontend
+import de.fraunhofer.aisec.cpg.graph.*
+import de.fraunhofer.aisec.cpg.graph.declarations.TranslationUnitDeclaration
+import de.fraunhofer.aisec.cpg.graph.types.Type
+import de.fraunhofer.aisec.cpg.sarif.PhysicalLocation
+import java.io.File
+import org.checkerframework.checker.nullness.qual.NonNull
+import org.jruby.Ruby
+import org.jruby.ast.BlockNode
+import org.jruby.ast.MethodDefNode
+import org.jruby.ast.RootNode
+import org.jruby.parser.Parser
+import org.jruby.parser.ParserConfiguration
+
+class RubyLanguageFrontend(language: RubyLanguage, ctx: @NonNull TranslationContext) :
+    LanguageFrontend<org.jruby.ast.Node, org.jruby.ast.Node>(language, ctx) {
+    val declarationHandler: DeclarationHandler = DeclarationHandler(this)
+    val expressionHandler: ExpressionHandler = ExpressionHandler(this)
+    val statementHandler: StatementHandler = StatementHandler(this)
+
+    override fun parse(file: File): TranslationUnitDeclaration {
+        val ruby = Ruby.getGlobalRuntime()
+        val parser = Parser(ruby)
+
+        val node =
+            parser.parse(
+                file.path,
+                file.inputStream(),
+                null,
+                ParserConfiguration(ruby, 0, false, true, false)
+            ) as RootNode
+
+        return handleRootNode(node)
+    }
+
+    private fun handleRootNode(node: RootNode): TranslationUnitDeclaration {
+        val tu = newTranslationUnitDeclaration(node.file, codeOf(node))
+
+        scopeManager.resetToGlobal(tu)
+
+        // The root node can either contain a single node or a block node
+        if (node.bodyNode is MethodDefNode) {
+            val decl = declarationHandler.handle(node.bodyNode)
+            scopeManager.addDeclaration(decl)
+        } else if (node.bodyNode is BlockNode) {
+            // Otherwise, we need to loop over the block
+            val block = node.bodyNode as BlockNode
+            for (innerNode in block.filterNotNull()) {
+                if (innerNode is MethodDefNode) {
+                    val decl = declarationHandler.handle(innerNode)
+                    scopeManager.addDeclaration(decl)
+                } else {
+                    val stmt = statementHandler.handle(innerNode)
+                    tu += stmt
+                }
+            }
+        }
+
+        return tu
+    }
+
+    override fun codeOf(astNode: org.jruby.ast.Node): String? {
+        return ""
+    }
+
+    override fun locationOf(astNode: org.jruby.ast.Node): PhysicalLocation? {
+        return null
+    }
+
+    override fun typeOf(type: org.jruby.ast.Node): Type {
+        return autoType()
+    }
+
+    override fun setComment(node: Node, astNode: org.jruby.ast.Node) {
+        // not yet implemented
+    }
+}
diff --git a/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/StatementHandler.kt b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/StatementHandler.kt
new file mode 100644
index 0000000000..be81d708f8
--- /dev/null
+++ b/cpg-language-ruby/src/main/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/StatementHandler.kt
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+package de.fraunhofer.aisec.cpg.frontends.ruby
+
+import de.fraunhofer.aisec.cpg.graph.newBlock
+import de.fraunhofer.aisec.cpg.graph.newReturnStatement
+import de.fraunhofer.aisec.cpg.graph.statements.ReturnStatement
+import de.fraunhofer.aisec.cpg.graph.statements.Statement
+import de.fraunhofer.aisec.cpg.graph.statements.expressions.Block
+import de.fraunhofer.aisec.cpg.graph.statements.expressions.ProblemExpression
+import org.jruby.ast.*
+
+class StatementHandler(lang: RubyLanguageFrontend) :
+    RubyHandler<Statement, Node>({ ProblemExpression() }, lang) {
+
+    override fun handleNode(node: Node): Statement {
+        return when (node) {
+            is BlockNode -> handleBlockNode(node)
+            is ReturnNode -> handleReturnNode(node)
+            else -> {
+                // We do not have an explicit statement wrapper around expressions, so we first try
+                // to parse the remaining nodes as an expression
+                frontend.expressionHandler.handleNode(node)
+            }
+        }
+    }
+
+    private fun handleBlockNode(blockNode: BlockNode): Block {
+        val compoundStatement = newBlock()
+
+        for (node in blockNode.filterNotNull()) {
+            compoundStatement.addStatement(handle(node))
+        }
+
+        return compoundStatement
+    }
+
+    private fun handleReturnNode(node: ReturnNode): ReturnStatement {
+        val stmt = newReturnStatement()
+        stmt.returnValue = frontend.expressionHandler.handleNode(node.valueNode)
+
+        return stmt
+    }
+}
diff --git a/cpg-language-ruby/src/test/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguageFrontendTest.kt b/cpg-language-ruby/src/test/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguageFrontendTest.kt
new file mode 100644
index 0000000000..7c15d86487
--- /dev/null
+++ b/cpg-language-ruby/src/test/kotlin/de/fraunhofer/aisec/cpg/frontends/ruby/RubyLanguageFrontendTest.kt
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2023, Fraunhofer AISEC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *                    $$$$$$\  $$$$$$$\   $$$$$$\
+ *                   $$  __$$\ $$  __$$\ $$  __$$\
+ *                   $$ /  \__|$$ |  $$ |$$ /  \__|
+ *                   $$ |      $$$$$$$  |$$ |$$$$\
+ *                   $$ |      $$  ____/ $$ |\_$$ |
+ *                   $$ |  $$\ $$ |      $$ |  $$ |
+ *                   \$$$$$   |$$ |      \$$$$$   |
+ *                    \______/ \__|       \______/
+ *
+ */
+package de.fraunhofer.aisec.cpg.frontends.ruby
+
+import de.fraunhofer.aisec.cpg.TestUtils
+import de.fraunhofer.aisec.cpg.assertLocalName
+import de.fraunhofer.aisec.cpg.graph.*
+import de.fraunhofer.aisec.cpg.graph.statements.expressions.LambdaExpression
+import java.nio.file.Path
+import kotlin.test.Test
+import kotlin.test.assertIs
+import kotlin.test.assertNotNull
+
+class RubyLanguageFrontendTest {
+    @Test
+    fun testFunctionDeclaration() {
+        val topLevel = Path.of("src", "test", "resources", "ruby")
+        val tu =
+            TestUtils.analyzeAndGetFirstTU(
+                listOf(topLevel.resolve("function.rb").toFile()),
+                topLevel,
+                true
+            ) {
+                it.registerLanguage<RubyLanguage>()
+            }
+        assertNotNull(tu)
+
+        val myFunction = tu.functions["my_function"]
+        assertNotNull(myFunction)
+
+        val anotherFunction = tu.functions["another_function"]
+        assertNotNull(anotherFunction)
+    }
+
+    @Test
+    fun testVariables() {
+        val topLevel = Path.of("src", "test", "resources", "ruby")
+        val tu =
+            TestUtils.analyzeAndGetFirstTU(
+                listOf(topLevel.resolve("variables.rb").toFile()),
+                topLevel,
+                true
+            ) {
+                it.registerLanguage<RubyLanguage>()
+            }
+        assertNotNull(tu)
+    }
+
+    @Test
+    fun testIter() {
+        val topLevel = Path.of("src", "test", "resources", "ruby")
+        val tu =
+            TestUtils.analyzeAndGetFirstTU(
+                listOf(topLevel.resolve("iter.rb").toFile()),
+                topLevel,
+                true
+            ) {
+                it.registerLanguage<RubyLanguage>()
+            }
+        assertNotNull(tu)
+
+        val each = tu.calls["each"]
+        assertNotNull(each)
+
+        val arg0 = each.arguments[0]
+        assertIs<LambdaExpression>(arg0)
+
+        val i = arg0.function.parameters[0]
+        assertLocalName("i", i)
+    }
+}
diff --git a/cpg-language-ruby/src/test/resources/ruby/function.rb b/cpg-language-ruby/src/test/resources/ruby/function.rb
new file mode 100644
index 0000000000..fc27bc5c9d
--- /dev/null
+++ b/cpg-language-ruby/src/test/resources/ruby/function.rb
@@ -0,0 +1,8 @@
+def my_function(value)
+  out = 2 * value
+  return out
+end
+
+def another_function()
+  a = 2
+end
\ No newline at end of file
diff --git a/cpg-language-ruby/src/test/resources/ruby/iter.rb b/cpg-language-ruby/src/test/resources/ruby/iter.rb
new file mode 100644
index 0000000000..8e9d9901f3
--- /dev/null
+++ b/cpg-language-ruby/src/test/resources/ruby/iter.rb
@@ -0,0 +1,4 @@
+a = [1,2,3,4,5]
+a.each do |i|
+   puts i
+end
\ No newline at end of file
diff --git a/cpg-language-ruby/src/test/resources/ruby/variables.rb b/cpg-language-ruby/src/test/resources/ruby/variables.rb
new file mode 100644
index 0000000000..16ae6f68f5
--- /dev/null
+++ b/cpg-language-ruby/src/test/resources/ruby/variables.rb
@@ -0,0 +1,6 @@
+$global = "some string"
+
+def test()
+  a = 4.0
+  puts $global
+end
diff --git a/gradle.properties.example b/gradle.properties.example
index f227448a38..c9e3c651dc 100644
--- a/gradle.properties.example
+++ b/gradle.properties.example
@@ -7,3 +7,4 @@ enableGoFrontend=true
 enablePythonFrontend=true
 enableLLVMFrontend=true
 enableTypeScriptFrontend=true
+enableRubyFrontend=true
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 40507dbf43..b7a66ec8a1 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -33,6 +33,10 @@ val enableTypeScriptFrontend: Boolean by extra {
     val enableTypeScriptFrontend: String? by settings
     enableTypeScriptFrontend.toBoolean()
 }
+val enableRubyFrontend: Boolean by extra {
+    val enableRubyFrontend: String? by settings
+    enableRubyFrontend.toBoolean()
+}
 
 if (enableJavaFrontend) include(":cpg-language-java")
 if (enableCXXFrontend) include(":cpg-language-cxx")
@@ -40,3 +44,4 @@ if (enableGoFrontend) include(":cpg-language-go")
 if (enableLLVMFrontend) include(":cpg-language-llvm")
 if (enablePythonFrontend) include(":cpg-language-python")
 if (enableTypeScriptFrontend) include(":cpg-language-typescript")
+if (enableRubyFrontend) include(":cpg-language-ruby")
\ No newline at end of file