LowGHSA-qpjv-v59x-3qc4CVE-2025-32421

Next.js Race Condition to Cache Poisoning

Published 15 May 2025 · Updated 26 Sept 2025

Affected packages

nextnpm

Affected: >=0.9.9 <14.2.24
Fixed in: 14.2.24

Update to the fixed version for your release line, for example:npm install next@14.2.24

nextnpm

Affected: >=15.0.0 <15.1.6
Fixed in: 15.1.6

Update to the fixed version for your release line, for example:npm install next@15.1.6

Details

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.

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References

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