Vulnerability in Vercel Next.js
CVE-2026-27977
Next.js is a React framework for building full-stack web applications. Starting in version 16.0.1 and prior to version 16.1.7, in `next dev`, cross-site protection for internal websocket endpoints could treat `Origin: null` as a bypass cas…
EPSS: 0.000 (0.5th percentile) — read the EPSS interpretation.
Affected products
- Vercel Next.js — versions >= 16.0.1, < 16.1.7
Weakness classification (CWE)
References
- https://github.com/vercel/next.js/security/advisories/GHSA-jcc7-9wpm-mj36 (x_refsource_CONFIRM)
- https://github.com/vercel/next.js/commit/862f9b9bb41d235e0d8cf44aa811e7fd118cee2a (x_refsource_MISC)
- https://github.com/vercel/next.js/releases/tag/v16.1.7 (x_refsource_MISC)