Deserialization in Facebook React
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. The vulnerabilities are triggered by sending spe…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.025 (82.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Facebook React
- Meta React-server-dom-parcel — versions 19.0.0, 19.1.0, 19.2.0
- Meta React-server-dom-turbopack — versions 19.0.0, 19.1.0, 19.2.0
- Meta React-server-dom-webpack — versions 19.0.0, 19.1.0, 19.2.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-23864?
- CVE-2026-23864 is a high-severity vulnerability in Facebook React, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-01-26.
- How severe is CVE-2026-23864?
- High severity. CVSS v3 base score is 7.5 out of 10.