'Exploitation is imminent' of max-severity React bug
- On Wednesday, the React team disclosed CVE-2025-55182, a maximum-severity unauthenticated remote code execution flaw in React Server Components.
- Developer Lachlan Davidson, lead of security innovation at Carapace, discovered and reported a deserialization defect to Meta on Saturday affecting Server Function endpoints.
- Affected versions include 19.0, 19.1.0, 19.1.1, and 19.2.0 of react-server-dom-webpack, react-server-dom-parcel, React-server-dom-turbopack; maintainers recommend upgrading to 19.0.1, 19.1.2, and 19.2.1.
- Researchers warned no attacks have been observed yet but expect exploitation soon and Meta privately notified hosting providers and cloud operators, sharing web application firewall rules as temporary mitigation.
- Security firms warned that downstream frameworks face long-tail impacts, while Vercel assigned CVE-2025-66478 and issued a patch alongside Meta's emergency patch rollout.
24 Articles
24 Articles
Critical vulnerability in React JS framework has a near 100% chance to be exploited
Researchers have uncovered a critical security flaw that could have catastrophic consequences for web and private cloud infrastructure. The vulnerability affects the React framework and represents a rare "perfect" issue – easy to exploit and capable of causing serious damage to web servers.Read Entire Article
Developers scramble as critical React flaw threatens major apps
Security researchers and code developers are scrambling to patch and investigate a critical vulnerability affecting React Server Components, an open-source library used widely across the internet and embedded into many essential software frameworks. The rapid response underscores the potential consequences of exploitation. Although no attacks have been observed or reported, researchers expect them soon and are urgently mobilizing resources to ad…
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