CVE-2025-32421

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.

Reserved 2025-04-08 | Published 2025-05-14 | Updated 2025-05-15 | Assigner GitHub_M

Problem types

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Product status

< 14.2.24
affected

>= 15.0.0, < 15.1.6
affected

References

github.com/...ext.js/security/advisories/GHSA-qpjv-v59x-3qc4

vercel.com/changelog/cve-2025-32421

cve.org (CVE-2025-32421)

nvd.nist.gov (CVE-2025-32421)

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