HighGHSA-7gfc-8cq8-jh5fCVE-2024-51479

Next.js authorization bypass vulnerability

Published 17 Dec 2024 · Updated 10 Sept 2025

Affected package

Affected: >=9.5.5 <14.2.15
Fixed in: 14.2.15

Update to the fixed version for your release line, for example:npm install next@14.2.15

Details

Impact

If a Next.js application is performing authorization in middleware based on pathname, it was possible for this authorization to be bypassed.

Patches

This issue was patched in Next.js 14.2.15 and later.

If your Next.js application is hosted on Vercel, this vulnerability has been automatically mitigated, regardless of Next.js version.

Workarounds

There are no official workarounds for this vulnerability.

Credits

We'd like to thank tyage (GMO CyberSecurity by IERAE) for responsible disclosure of this issue.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.