{"id":"CVE-2026-53667","summary":"React Router: Cross-site Scripting is Possible due to Missing RSCErrorHandler Protocol Validation (Incomplete fix for CVE-2026-53667)","details":"React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.","aliases":["GHSA-h8fp-f39c-q6mh"],"modified":"2026-07-30T03:52:24.629807046Z","published":"2026-07-27T21:21:16.084Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53667.json"},"references":[{"type":"WEB","url":"https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180"},{"type":"WEB","url":"https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53667.json"},{"type":"ADVISORY","url":"https://github.com/remix-run/react-router/security/advisories/GHSA-h8fp-f39c-q6mh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53667"},{"type":"FIX","url":"https://github.com/remix-run/react-router/commit/ce596e823f0d7b883a433af1d5a839a8b9fe0242"},{"type":"FIX","url":"https://github.com/remix-run/react-router/pull/15177"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/remix-run/react-router","events":[{"introduced":"b34a9cd1f74231ded97c1e6ca9dff8f09a1b87ca"},{"fixed":"24283e93971e3e4f9f909c0bae63583f173fcd52"}],"database_specific":{"extracted_events":[{"introduced":"7.11.0"},{"fixed":"7.18.0"}],"source":"AFFECTED_FIELD"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53667.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N"}]}