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Description

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.

PUBLISHED Reserved 2026-01-16 | Published 2026-04-08 | Updated 2026-04-08 | Assigner Meta




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

(CWE-502) Deserialization of Untrusted Data, (CWE-400) Uncontrolled Resource Consumption

Product status

Default status
unaffected

19.0.0 (semver)
affected

19.1.0 (semver)
affected

19.2.0 (semver)
affected

Default status
unaffected

19.0.0 (semver)
affected

19.1.0 (semver)
affected

19.2.0 (semver)
affected

Default status
unaffected

19.0.0 (semver)
affected

19.1.0 (semver)
affected

19.2.0 (semver)
affected

References

github.com/.../react/security/advisories/GHSA-479c-33wc-g2pg

cve.org (CVE-2026-23869)

nvd.nist.gov (CVE-2026-23869)

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