# CVE-2025-32421: Next.js Race Condition to Cache Poisoning

> CVE-2025-32421: Next.js Race Condition to Cache Poisoning. CVSS 3.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-32421
Last updated: 2026-06-17T09:11:58Z

- Published: 2025-05-14 22:56 UTC · Updated: 2026-06-17 09:11 UTC · Assigner: GitHub\_M
- CVSS: 3.7 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS: 0.81%, 57th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-362

## Description

Next.js is a React framework for building full-stack web applications. Versions prior to 14.2.24 and 15.1.6 have a race-condition vulnerability. This issue only affects the Pages Router under certain misconfigurations, causing normal endpoints to serve \`pageProps\` data instead of standard HTML. This issue was patched in versions 15.1.6 and 14.2.24 by stripping the \`x-now-route-matches\` header from incoming requests. Applications hosted on Vercel's platform are not affected by this issue, as the platform does not cache responses based solely on \`200 OK\` status without explicit \`cache-control\` headers. Those who self-host Next.js deployments and are unable to upgrade immediately can mitigate this vulnerability by stripping the \`x-now-route-matches\` header from all incoming requests at the content development network and setting \`cache-control: no-store\` for all responses under risk. The maintainers of Next.js strongly recommend only caching responses with explicit cache-control headers.

## Affected vendors and products

- vercel: next.js

## Tracked companies

- [Vercel](https://rewindex.com/company/vercel.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-32421)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-32421)
- [https://github.com/vercel/next.js/security/advisories/GHSA-qpjv-v59x-3qc4](https://github.com/vercel/next.js/security/advisories/GHSA-qpjv-v59x-3qc4)
- [https://vercel.com/changelog/cve-2025-32421](https://vercel.com/changelog/cve-2025-32421)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-32421 · Markdown: https://rewindex.com/cve/CVE-2025-32421.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-32421 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:05:40.239Z