CVE-2026-23869: high-severity vulnerability in Meta react-server-dom-parcel
Published · Updated
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41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 1.6%
from disclosure to weapon87 days
Published on NVDApr 8
1st PoC+87d
A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack and react-server-dom-webpack (versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4). The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.The payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Meta · react-server-dom-parcelMeta · react-server-dom-turbopackMeta · react-server-dom-webpackpublic PoCs found — 1
githubgithub.com/shaheryar773/mitigate-cve-2026-23869-react-server-component-loops★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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