CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-23869
High (7.5). EPSS 1.6% chance of exploitation in the next 30 days. Fixed in react-server-dom-parcel 19.0.5, 19.1.6, 19.2.5.
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.
Severity
- EPSS
- 1.6% chance of exploitation in the next 30 days; higher than 75% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-400, CWE-502, CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-479c-33wc-g2pg | npm | react-server-dom-parcel | >=19.0.0 <19.0.5 | 19.0.5 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-parcel | >=19.1.0 <19.1.6 | 19.1.6 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-parcel | >=19.2.0 <19.2.5 | 19.2.5 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-turbopack | >=19.0.0 <19.0.5 | 19.0.5 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-turbopack | >=19.1.0 <19.1.6 | 19.1.6 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-turbopack | >=19.2.0 <19.2.5 | 19.2.5 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-webpack | >=19.0.0 <19.0.5 | 19.0.5 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-webpack | >=19.1.0 <19.1.6 | 19.1.6 |
| GHSA-479c-33wc-g2pg | npm | react-server-dom-webpack | >=19.2.0 <19.2.5 | 19.2.5 |