CVE-2026-23864
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
react-server-dom-parcelnpm | >= 19.0.0, < 19.0.4 | 19.0.4 |
react-server-dom-turbopacknpm | >= 19.1.0-canary-7130d0c6-20241212, < 19.1.5 | 19.1.5 |
react-server-dom-webpacknpm | >= 19.2.0-canary-63779030-20250328, < 19.2.4 | 19.2.4 |
react-server-dom-turbopacknpm | >= 19.0.0, < 19.0.4 | 19.0.4 |
react-server-dom-parcelnpm | >= 19.1.0-canary-7130d0c6-20241212, < 19.1.5 | 19.1.5 |
react-server-dom-parcelnpm | >= 19.2.0-canary-63779030-20250328, < 19.2.4 | 19.2.4 |
react-server-dom-webpacknpm | >= 19.1.0-canary-7130d0c6-20241212, < 19.1.5 | 19.1.5 |
react-server-dom-webpacknpm | >= 19.0.0, < 19.0.4 | 19.0.4 |
react-server-dom-turbopacknpm | >= 19.2.0-canary-63779030-20250328, < 19.2.4 | 19.2.4 |
Affected products
4- ghsa-coords3 versions
>= 19.0.0, < 19.0.4+ 2 more
- (no CPE)range: >= 19.0.0, < 19.0.4
- (no CPE)range: >= 19.1.0-canary-7130d0c6-20241212, < 19.1.5
- (no CPE)range: >= 19.2.0-canary-63779030-20250328, < 19.2.4
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-83fc-fqcc-2hmgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-23864ghsaADVISORY
- github.com/facebook/react/security/advisories/GHSA-83fc-fqcc-2hmgghsaWEB
- react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsghsaWEB
- www.facebook.com/security/advisories/cve-2026-23864ghsax_refsource_CONFIRMWEB
News mentions
1- ⚡ Weekly Recap: Linux Rootkit, macOS Crypto Stealer, WebSocket Skimmers and MoreThe Hacker News · May 11, 2026