Next.js: Cache poisoning in React Server Component responses_CVE-2026-44576

5.4 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

Description

Next.js is a React framework for building full-stack web applications. From 14.2.0 to before 15.5.16 and 16.2.5, applications using React Server Components can be vulnerable to cache poisoning when shared caches do not correctly partition response variants. Under affected conditions, an attacker can cause an RSC response to be served from the original URL and poison shared cache entries so later visitors receive component payloads instead of the expected HTML. This vulnerability is fixed in 15.5.16 and 16.2.5.

Basic Information

ID CVE-2026-44576

Source GitHub_M

Published May 13, 2026 at 16:57

Affected Product

Vendor vercel

Product next.js

Version >= 14.2.0, < 15.5.16

Affected Versions vercel next.js >= 14.2.0, < 15.5.16
vercel next.js >= 16.0.0, < 16.2.5

CWE Classification

CWE-436

References

github.com /vercel/next.js/security/advisories/GHSA-wfc6-r584-vfw7

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