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Next.js and React versions vulnerable to critical exploits

A critical security vulnerability has been identified in Next.js versions 15.5.18 and 16.2.6, along with React versions 19.0.6, 19.1.7, and 19.2.6. The vulnerability affects packages related to server-side rendering and can lead to various exploits including middleware bypass, denial of service, and cross-site scripting. Users are strongly advised to upgrade immediately to patch these security risks. AI

Summary written by gemini-2.5-flash-lite from 1 source. How we write summaries →

IMPACT Security flaws in Next.js and React could impact AI applications built with these frameworks.

RANK_REASON Security vulnerability in a widely used software framework.

Read on Mastodon — fosstodon.org →

COVERAGE [1]

  1. Mastodon — fosstodon.org TIER_1 · [email protected] ·

    Upgrade immediately. # NextJs : 15.5.18, 16.2.6 # React : 19.0.6, 19.1.7, 19.2.6 for the react-server-dom-parcel, react-server-dom-webpack and react-server-dom-

    Upgrade immediately. # NextJs : 15.5.18, 16.2.6 # React : 19.0.6, 19.1.7, 19.2.6 for the react-server-dom-parcel, react-server-dom-webpack and react-server-dom-turbopack packages https:// vercel.com/changelog/next-js-m ay-2026-security-release Vulnerability: - Middleware and prox…