diff --git a/nomad/structs/actions.go b/nomad/structs/actions.go
index db78efd395..231c04cbd2 100644
--- a/nomad/structs/actions.go
+++ b/nomad/structs/actions.go
@@ -9,11 +9,16 @@ package structs
 
 import (
 	"errors"
+	"fmt"
+	"regexp"
 	"slices"
 
 	"github.com/hashicorp/go-multierror"
 )
 
+// validJobActionName is used to validate a action name.
+var validJobActionName = regexp.MustCompile(`^[^\x00\s]{1,128}$`)
+
 type Action struct {
 	Name    string
 	Command string
@@ -80,6 +85,9 @@ func (a *Action) Validate() error {
 	if a.Command == "" {
 		mErr = multierror.Append(mErr, errors.New("command cannot be empty"))
 	}
+	if !validJobActionName.MatchString(a.Name) {
+		mErr = multierror.Append(mErr, fmt.Errorf("invalid name '%s'", a.Name))
+	}
 
 	return mErr.ErrorOrNil()
 }