chore(deps): update dependency better-auth to v1.1.6 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
better-auth (source)	1.1.3 -> 1.1.6

GitHub Vulnerability Alerts

CVE-2024-56734

Summary

An open redirect vulnerability has been identified in the verify email endpoint of Better Auth, potentially allowing attackers to redirect users to malicious websites. This issue affects users relying on email verification links generated by the library.

Affected Versions

• All versions prior to v1.1.6.

Impact

Attackers could craft malicious email verification links that exploit the redirect functionality to send users to untrusted domains. This can result in:

• Phishing attacks – Users may unknowingly enter sensitive information on fake login pages.
• Reputation damage – Trust issues for applications using Better Auth.

Vulnerability Details

The verify email callback endpoint accepts a callbackURL parameter. Unlike other verification methods, email verification only uses JWT to verify and redirect without proper validation of the target domain. The origin checker is bypassed in this scenario because it only checks for POST requests. An attacker can manipulate this parameter to redirect users to arbitrary URLs controlled by the attacker.

Example Exploit:

https://example.com/auth/verify-email?token=abcd1234&callbackURL=https://malicious-site.com

Patches

Upgrade to Better Auth v1.1.6 or later. This version enforces domain validation for callbackURL for /verify-email path and for all other GET endpoints.

Workarounds

You can also use hooks to pre-check URLs in your auth instance to prevent this without upgrading:

const auth = betterAuth({
    hooks: {
         before: (ctx) => {
            if (ctx.path === "/verify-email") {
               const callbackURL = ctx.query.callbackURL; // Check if this is a trusted callback URL or not
            }
         }
    }
})

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Release Notes

better-auth/better-auth (better-auth)

v1.1.6

Compare Source

    🔓 Security Fixes

• Enforce origin checker for all GET methods  -  by @​Bekacru (deb3d)

    View changes on GitHub

v1.1.5

Compare Source

   🐞 Bug Fixes

• Upgrade better-auth utils and use subtle from better-auth utils  -  by @​Bekacru in https://github.com/better-auth/better-auth/issues/1021 (2b685)
• Disallow the creator role as a possible invitation role for all inviter roles other than itself  -  by @​Bekacru (6ab16)
• Throw error in multiple resource permission checks  -  by @​Bekacru (ceea5)
• email-otp:
  • Apply user configration for expiresIn properly  -  by @​Bekacru in https://github.com/better-auth/better-auth/issues/1033 (f9fdf)
  • It shouldn't send email if user doesn't exist on forget password  -  by @​Bekacru in https://github.com/better-auth/better-auth/issues/1034 (71713)
• passkey:
  • User verification shouldn't be required on passkey registration  -  by @​canstand in https://github.com/better-auth/better-auth/issues/1053 (00996)

    View changes on GitHub

v1.1.4

Compare Source

   🐞 Bug Fixes

• drizzle: Default to snake-case  -  by @​Bekacru in https://github.com/better-auth/better-auth/issues/1012 (bfc8f)
• email-otp: Reset password should create credential account  -  by @​Bekacru (d2788)
• expo: Local session cache should be scopped  -  by @​Bekacru in https://github.com/better-auth/better-auth/issues/1020 (ef2ff)
• vue: Auth path should account for double slash on ssr  -  by @​Bekacru (78b6b)

    View changes on GitHub

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