{"action":"Upgrade react-router to 7.12.0 or later.","affected":[{"fixed":"7.12.0","introduced":"7.0.0"}],"component":"react-router","cve_ids":["CVE-2026-21884"],"ecosystem":"npm","epss":0.00531,"exploited":false,"fixed_versions":["7.12.0"],"ghsa_id":"GHSA-8v8x-cx79-35w7","id":"tcs_01M5KFE0J84AT3TPCBQ9XQB1X1","modified_at":"2026-09-08T16:45:04.190133160Z","published_at":"2026-01-08T20:50:05Z","references":["https://osv.dev/vulnerability/GHSA-8v8x-cx79-35w7","https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7","https://nvd.nist.gov/vuln/detail/CVE-2026-21884","https://github.com/remix-run/react-router/pull/14705","https://github.com/remix-run/react-router/commit/c89c32c562a7723c45ee71dab1c892acaf7a608d","https://access.redhat.com/errata/RHSA-2026:19712","https://access.redhat.com/errata/RHSA-2026:3782","https://access.redhat.com/errata/RHSA-2026:3958","https://access.redhat.com/errata/RHSA-2026:3960","https://access.redhat.com/security/cve/CVE-2026-21884","https://bugzilla.redhat.com/show_bug.cgi?id=2428421","https://github.com/remix-run/react-router","https://github.com/remix-run/react-router/blob/react-router%407.12.0/CHANGELOG.md#v7120","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21884.json"],"severity":{"label":"high","score":8.2},"sources":[{"source":"osv","source_id":"GHSA-8v8x-cx79-35w7","url":"https://osv.dev/vulnerability/GHSA-8v8x-cx79-35w7"}],"summary":"React Router SSR XSS in ScrollRestoration"}