What are the React Server Components vulnerabilities?

Three DoS (CVSS 7.5) via crafted requests causing crashes/loops, one code exposure (5.3) leaking server function source. Hits react-server-dom-* packages 19.0.0-19.2.3.

Should I upgrade React for these Server Components bugs?

Yes, immediately to 19.0.4+, 19.1.5+, or 19.2.4+. Frameworks like Next.js affected too.

Does React Server Components affect my app?

Only if using server-side React or RSC frameworks/bundlers. Pure client-side or React Native (non-monorepo)? Safe.

🔒 Security & Privacy

React Server Components: Three New CVEs Expose DoS Crashes and Source Code Leaks

Three fresh CVEs just slammed React Server Components: two DoS nightmares at CVSS 7.5, plus a sneaky source code leak. If you're running affected versions, your server's a sitting duck.

theAIcatchup Apr 07, 2026 4 min read

React Server Components security advisory with CVE listings and patch instructions

⚡ Key Takeaways

Three high-severity DoS CVEs (7.5) and one code leak in React Server Components—patch versions 19.0.0-19.2.3 now. 𝕏
Affected: Next.js, react-router, and others; even apps without explicit Server Functions vulnerable. 𝕏
Unique risk: Rushed RSC adoption echoes past JS ecosystem pitfalls—prioritize audits over hype. 𝕏

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theAIcatchup

Community-driven. Code-first.

#CVE-2025-55184 #DoS vulnerability #Next.js security #React Server Components #source code exposure #source code leak

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Originally reported by React Blog

⚡ Key Takeaways

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