GHSA-qpjv-v59x-3qc4 · Severity: low · Ecosystem: npm — Next.js Race Condition to Cache Poisoning
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.
Conclusion & alert: CVE-2025-32421 is rated Moderate Risk (40.9/100): CVSS Low severity, with medium exploitation likelihood (EPSS 0.75%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-13 | 0.36% | 0.75% | +0.39% |
| 2 | 2026-03-10 | 0.12% | 0.36% | +0.24% |
| 3 | 2026-03-05 | — | 0.12% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 3.7 | 3.1 | LOW |
|
2.2 | 1.4 | [email protected] |
GHSA-qpjv-v59x-3qc4 · Severity: low · Ecosystem: npm — Next.js Race Condition to Cache Poisoning
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2025-32421 |
| URL | Tags |
|---|---|
| https://github.com/vercel/next.js/security/advisories/GHSA-qpjv-v59x-3qc4 | Vendor Advisory |
| https://vercel.com/changelog/cve-2025-32421 | Vendor Advisory |