VDB
CVE-2026-23869
CVE-2026-23869
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 0.84% · 75.1th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.84%
75.1th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Meta | react-server-dom-parcel | 19.2.0, 19.1.0, 19.0.0 |
| Meta | react-server-dom-turbopack | 19.1.0, 19.2.0, 19.0.0 |
| Meta | react-server-dom-webpack | 19.2.0, 19.1.0, 19.0.0 |
Timeline
- Apr 8, 2026 CVE Published
- Apr 14, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score
- May 27, 2026 EPSS Score
References
- https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg url
- What is CVE-2026-23869? React Server Components Security Alert third-party-analysis
- Blog third-party-analysis