{"id":"CVE-2026-53663","aliases":["GHSA-84g9-w2xq-vcv6"],"url":"https://o3.security/vulnerability/CVE-2026-53663","summary":"React Router: `handleDocumentRequest` CSRF check covers `POST` only; PUT/PATCH/DELETE bypass","details":"React Router is a router for React. From 7.12.0 until 7.15.1, certain CSRF checks in React Router v7 Framework Mode were insufficient and run on POST requests, but were bypassed on PUT/PATCH/DELETE requests. This is a low severity vulnerability because modern browser protections (CORS preflight, SameSite cookies) already block the cross-origin attack vectors that this missing CSRF check would otherwise gate. This vulnerability is fixed in 7.15.1.","published":"2026-06-22T17:39:29.160Z","modified":"2026-08-12T03:51:23.751246165Z","cvss":{"score":3.1,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N"},"epss":{"score":0.00148,"percentile":0.04299,"asOf":"2026-09-02"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"react-router","fixedVersion":"7.15.1"},{"ecosystem":"npm","name":"@remix-run/server-runtime","fixedVersion":"2.17.5"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53663.json"},{"type":"ADVISORY","url":"https://github.com/remix-run/react-router/security/advisories/GHSA-84g9-w2xq-vcv6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53663"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:23.751246165Z"}}