Next.js ships critical security patches
A coordinated May release fixes 13 advisories across DoS, middleware/proxy bypass, SSRF, cache poisoning, XSS, and an RSC CVE—teams should upgrade immediately.
Next.js May 2026 security release — Summary We have shipped a coordinated security release for Next.js addressing 13 advisories across denial of service, middleware and proxy bypass, server-side request forgery, cache poisoning, and cross-site scripting. One advisory addresses an upstream React Server Components vulnerability tracked as . CVE-2026-23870 Patched versions are available for both React and Next.js, and all should upgrade immediately.affected users The release addresses the follow...

