Cve-2026-126187 - CraftedSignal Threat Feedhttps://feed.craftedsignal.io/tags/cve-2026-126187/Trending threats, MITRE ATT&CK coverage, and detection metadata. Fed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioWed, 11 Nov 2026 07:26:10 +0000https://feed.craftedsignal.io/favicon-32x32.pngCraftedSignal Threat Feedhttps://feed.craftedsignal.io/3232https://feed.craftedsignal.io/favicon.svgReact: Unauthenticated Remote Code Execution in React Server Components (CVE-2026-126187)https://feed.craftedsignal.io/briefs/2026-11-react-rce/Wed, 11 Nov 2026 07:26:10 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-11-react-rce/A critical remote code execution vulnerability in React Server Components packages allows unauthenticated attackers to execute code via crafted responses involving multiple typed arrays.CVE-2026-126187 is a critical remote code execution vulnerability affecting react-server-dom-webpack, react-server-dom-parcel, and react-server-dom-turbopack. The vulnerability occurs in rare cases where responses transport multiple typed arrays and an attacker-controlled value.

Scope

This affects applications using frameworks that support React Server Components. Applications not using a server, or not using a framework, bundler, or bundler plugin that supports React Server Components, are not affected.

Recommendation

Upgrade affected packages to versions 19.0.9, 19.1.10, 19.2.9, or 19.3.1.

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