🚨 [security] Update next 14.2.23 → 14.2.30 (patch)

[depfu]

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🚨 Your current dependencies have known security vulnerabilities 🚨

This dependency update fixes known security vulnerabilities. Please see the details below and assess their impact carefully. We recommend to merge and deploy this as soon as possible!

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Here is everything you need to know about this update. Please take a good look at what changed and the test results before merging this pull request.

What changed?

✳️ next (14.2.23 → 14.2.30) · Repo

Security Advisories 🚨

🚨 Information exposure in Next.js dev server due to lack of origin verification

Summary

A low-severity vulnerability in Next.js has been fixed in version 15.2.2. This issue may have allowed limited source code exposure when the dev server was running with the App Router enabled. The vulnerability only affects local development environments and requires the user to visit a malicious webpage while npm run dev is active.

Because the mitigation is potentially a breaking change for some development setups, to opt-in to the fix, you must configure allowedDevOrigins in your next config after upgrading to a patched version. Learn more.

Learn more: https://vercel.com/changelog/cve-2025-48068

Credit

Thanks to sapphi-red and Radman Siddiki for responsibly disclosing this issue.

🚨 Next.js Race Condition to Cache Poisoning

Summary
We received a responsible disclosure from Allam Rachid (zhero) for a low-severity race-condition vulnerability in Next.js. This issue only affects the Pages Router under certain misconfigurations, causing normal endpoints to serve pageProps data instead of standard HTML.

Learn more here

Credit
Thank you to Allam Rachid (zhero) for the responsible disclosure. This research was rewarded as part of our bug bounty program.

🚨 Next.js may leak x-middleware-subrequest-id to external hosts

Summary

In the process of remediating CVE-2025-29927, we looked at other possible exploits of Middleware. We independently verified this low severity vulnerability in parallel with two reports from independent researchers.

Learn more here.

Credit

Thank you to Jinseo Kim kjsman and RyotaK (GMO Flatt Security Inc.) with takumi-san.ai for the responsible disclosure. These researchers were awarded as part of our bug bounty program.

🚨 Authorization Bypass in Next.js Middleware

Impact

It is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware.

Patches

• For Next.js 15.x, this issue is fixed in 15.2.3
• For Next.js 14.x, this issue is fixed in 14.2.25
• For Next.js 13.x, this issue is fixed in 13.5.9
• For Next.js 12.x, this issue is fixed in 12.3.5
• For Next.js 11.x, consult the below workaround.

Note: Next.js deployments hosted on Vercel are automatically protected against this vulnerability.

Workaround

If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application.

Credits

• Allam Rachid (zhero;)
• Allam Yasser (inzo_)

Release Notes

14.2.30

Note

This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• Backport config.allowedDevOrigins (#80410) (Learn More)

Credits

Huge thanks to @ijjk and @ztanner for helping!

14.2.28

Note

This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• fix: node.js module import error when using middleware (#77945)

Credits

Huge thanks to @ztanner for helping!

14.2.26

Note

This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• Match subrequest handling for edge and node (#77476)

14.2.25

Note

This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• Update middleware request header (#77202)

Credits

Huge thanks to @ijjk for helping!

14.2.24

Note

This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• fix: ensure lint worker errors aren't silenced (#75779)
• add additional x-middleware-set-cookie filtering (#75561 & #73482)

Credits

Huge thanks to @ztanner for helping!

Does any of this look wrong? Please let us know.

Sorry, we couldn't find anything useful about this release.

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Closing because this update has already been applied