{"cve":"CVE-2026-23869","nvd":{"published":"2026-04-08T20:16:23.003","modified":"2026-07-25T11:10:00.100","status":"Awaiting Analysis","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400","CWE-502","CWE-770"],"references":["https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg","https://access.redhat.com/security/cve/CVE-2026-23869","https://bugzilla.redhat.com/show_bug.cgi?id=2456663","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23869.json"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-23869","score":0.01551,"percentile":0.75098,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-479c-33wc-g2pg","url":"https://osv.dev/vulnerability/GHSA-479c-33wc-g2pg","summary":"React Server Components have a Denial of Service Vulnerability","modified":"2026-04-10T15:57:10.364539Z","packages":[{"ecosystem":"npm","name":"react-server-dom-parcel","purl":"pkg:npm/react-server-dom-parcel","ranges":[">=19.0.0 <19.0.5"],"fixed":["19.0.5"]},{"ecosystem":"npm","name":"react-server-dom-parcel","purl":"pkg:npm/react-server-dom-parcel","ranges":[">=19.1.0 <19.1.6"],"fixed":["19.1.6"]},{"ecosystem":"npm","name":"react-server-dom-parcel","purl":"pkg:npm/react-server-dom-parcel","ranges":[">=19.2.0 <19.2.5"],"fixed":["19.2.5"]},{"ecosystem":"npm","name":"react-server-dom-turbopack","purl":"pkg:npm/react-server-dom-turbopack","ranges":[">=19.0.0 <19.0.5"],"fixed":["19.0.5"]},{"ecosystem":"npm","name":"react-server-dom-turbopack","purl":"pkg:npm/react-server-dom-turbopack","ranges":[">=19.1.0 <19.1.6"],"fixed":["19.1.6"]},{"ecosystem":"npm","name":"react-server-dom-turbopack","purl":"pkg:npm/react-server-dom-turbopack","ranges":[">=19.2.0 <19.2.5"],"fixed":["19.2.5"]},{"ecosystem":"npm","name":"react-server-dom-webpack","purl":"pkg:npm/react-server-dom-webpack","ranges":[">=19.0.0 <19.0.5"],"fixed":["19.0.5"]},{"ecosystem":"npm","name":"react-server-dom-webpack","purl":"pkg:npm/react-server-dom-webpack","ranges":[">=19.1.0 <19.1.6"],"fixed":["19.1.6"]},{"ecosystem":"npm","name":"react-server-dom-webpack","purl":"pkg:npm/react-server-dom-webpack","ranges":[">=19.2.0 <19.2.5"],"fixed":["19.2.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}