CVE-2026-23864: high-severity vulnerability in Meta react-server-dom-parcel
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 2.6%
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.
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-webpackRelated CVEs — Meta react-server-dom-parcel
In the same product, most dangerous first.
References
https://access.redhat.com/errata/RHSA-2026:13571https://access.redhat.com/errata/RHSA-2026:34608https://access.redhat.com/security/cve/CVE-2026-23864https://bugzilla.redhat.com/show_bug.cgi?id=2433059https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23864.jsonhttps://www.facebook.com/security/advisories/cve-2026-23864