New React Server Components Flaw Could Let Attackers Trigger DoS

Gbhackers •Divya • April 10, 2026

A newly disclosed high-severity vulnerability in React Server Components could allow unauthenticated attackers to trigger a Denial of Service (DoS) condition. Tracked as CVE-2026-23869, this flaw poses a significant risk to web applications using specific server-side rendering packages. Because the exploit requires no privileges and involves low attack complexity, threat actors can easily target vulnerable […]

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High-Severity Vulnerability in React Server Components Enables DoS Attacks A high-severity vulnerability, tracked as CVE-2026-23869, has been identified in React Server Components, allowing unauthenticated remote attackers to launch Denial of Service (DoS) attacks. This flaw enables attackers to exhaust backend server resources using specially crafted network requests. The vulnerability poses a significant risk to web applications utilizing specific server-side rendering packages. The GitHub Security Advisory has rated this vulnerability as High severity due to its low complexity and the lack of required privileges for exploitation. The first public proof of concept (PoC) was released on April 10, 2026, shortly after the vulnerability was published on April 8, 2026. Organizations using affected React components are urged to assess their systems for potential exposure. Immediate action is recommended to mitigate the risk of exploitation. 2 sources 69

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New React Server Components Flaw Could Let Attackers Trigger DoS

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Extracted Entities

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