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Description

Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack. The vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.

PUBLISHED Reserved 2026-01-16 | Published 2026-01-26 | Updated 2026-01-26 | Assigner Meta

Problem types

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

Product status

Default status
unaffected

19.0.0 (semver) before 19.0.4
affected

19.1.0 (semver) before 19.1.5
affected

19.2.0 (semver) before 19.2.4
affected

Default status
unaffected

19.0.0 (semver) before 19.0.4
affected

19.1.0 (semver) before 19.1.5
affected

19.2.0 (semver) before 19.2.4
affected

Default status
unaffected

19.0.0 (semver) before 19.0.4
affected

19.1.0 (semver) before 19.1.5
affected

19.2.0 (semver) before 19.2.4
affected

References

www.facebook.com/security/advisories/cve-2026-23864

cve.org (CVE-2026-23864)

nvd.nist.gov (CVE-2026-23864)

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