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 |