CVE-2025-32421

LOW3.7EPSS 0.75%

Next.js Race Condition to Cache Poisoning

Published: 5/15/2025Modified: 9/26/2025

Description

**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](https://vercel.com/changelog/cve-2025-32421) **Credit** Thank you to **Allam Rachid (zhero)** for the responsible disclosure. This research was rewarded as part of our bug bounty program.

Affected packages (1)

npm/next>= 0.9.9, < 14.2.24

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	LOW3.7	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References (4)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-32421
PATCHhttps://github.com/vercel/next.js
WEBhttps://github.com/vercel/next.js/security/advisories/GHSA-qpjv-v59x-3qc4
WEBhttps://vercel.com/changelog/cve-2025-32421