CVE-2025-49005

Next.js is a React framework for building full-stack web applications. In Next.js App Router from 15.3.0 to before 15.3.3 and Vercel CLI from 41.4.1 to 42.2.0, a cache poisoning vulnerability was found. The issue allowed page requests for HTML content to return a React Server Component (RSC) payload instead under certain conditions. When deployed to Vercel, this would only impact the browser cache, and would not lead to the CDN being poisoned. When self-hosted and deployed externally, this could lead to cache poisoning if the CDN does not properly distinguish between RSC / HTML in the cache keys. This issue has been resolved in Next.js 15.3.3.

The following products are affected by CVE-2025-49005 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-49005.

URL	Resource
https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066
https://github.com/vercel/next.js/issues/79346
https://github.com/vercel/next.js/releases/tag/v15.3.3
https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4
https://nvd.nist.gov/vuln/detail/CVE-2025-49005
https://vercel.com/changelog/cve-2025-49005
https://www.cve.org/CVERecord?id=CVE-2025-49005