CVE-2026-23864
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.43% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-502, CWE-1284
- Affected
- facebook/react
- Source
- cve-assign@fb.com
References
- https://www.facebook.com/security/advisories/cve-2026-23864Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:13571
- https://access.redhat.com/errata/RHSA-2026:34608
- https://access.redhat.com/security/cve/CVE-2026-23864
- https://bugzilla.redhat.com/show_bug.cgi?id=2433059
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23864.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.