{"id":"CVE-2026-53667","aliases":["CLSA-2026-1791465168","CLSA-2026-1792191744","CLSA-2026-1792253402","CLSA-2026-1792253416","CLSA-2026-1793102180","CLSA-2026-1793810913","EUVD-2026-49629","GHSA-h8fp-f39c-q6mh","ROOT-APP-NPM-CVE-2026-53667"],"status":"published","title":"React Router: Cross-site Scripting is Possible due to Missing RSCErrorHandler Protocol Validation (Incomplete fix for CVE-2026-53667)","description":"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.","severity":{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00355,"percentile":0.29616,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-07-23T19:35:57Z","modified":"2026-11-06T13:28:06Z","fixes":[{"ecosystem":"npm","package":"react-router","fixed_in":["7.18.0"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"react-router","fixed_in":["7.18.0-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/react-router","fixed_in":["7.18.0-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"react-router","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.11.0"},{"fixed":"7.18.0"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"react-router","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.15.0-tuxcare.0"},{"fixed":"7.15.0-tuxcare.1"}]}],"versions":["7.15.0"],"bundled":4},{"source":"osv","ecosystem":"TuxCare:npm","package":"react-router","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.14.2-tuxcare.0"},{"fixed":"7.14.2-tuxcare.1"}]}],"versions":["7.14.2"],"bundled":4},{"source":"osv","ecosystem":"TuxCare:npm","package":"react-router-dom","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.15.0-tuxcare.0"},{"fixed":"7.15.0-tuxcare.1"}]}],"versions":["7.15.0"],"bundled":4},{"source":"osv","ecosystem":"TuxCare:npm","package":"react-router-dom","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.14.2-tuxcare.0"},{"fixed":"7.14.2-tuxcare.1"}]}],"versions":["7.14.2"],"bundled":4},{"source":"osv","ecosystem":"TuxCare:npm","package":"react-router","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.13.1-tuxcare.0"},{"fixed":"7.13.1-tuxcare.2"}]}],"versions":["7.13.1","7.13.1-tuxcare.1"],"bundled":5},{"source":"osv","ecosystem":"TuxCare:npm","package":"react-router","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.14.1-tuxcare.0"},{"fixed":"7.14.1-tuxcare.4"}]}],"versions":["7.14.1","7.14.1-tuxcare.1","7.14.1-tuxcare.2","7.14.1-tuxcare.3"],"bundled":2},{"source":"osv","ecosystem":"npm","package":"react-router","ranges":[{"type":"SEMVER","events":[{"introduced":"7.11.0"},{"fixed":"7.18.0"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"react-router","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.18.0-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/react-router","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.18.0-root.io.1"}]}]}],"products":[{"vendor":"@tanstack","product":"react-router"},{"vendor":"remix-run","product":"react-router"},{"vendor":"shopify","product":"react-router"}],"references":[{"url":"https://github.com/remix-run/react-router/security/advisories/GHSA-h8fp-f39c-q6mh","tags":["x_refsource_CONFIRM","Third Party Advisory","advisory","web"]},{"url":"https://github.com/remix-run/react-router/pull/15177","tags":["x_refsource_MISC","Issue Tracking","Patch","fix","web"]},{"url":"https://github.com/remix-run/react-router/commit/ce596e823f0d7b883a433af1d5a839a8b9fe0242","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/advisories/GHSA-h8fp-f39c-q6mh"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53667.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53667","tags":["advisory"]},{"url":"https://github.com/remix-run/react-router","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-53667","title":"React Router: Cross-site Scripting is Possible due to Missing RSCErrorHandler Protocol Validation (Incomplete fix for CVE-2026-53667)","description":"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.","status":"published","published":"2026-07-27T21:21:16.084Z","modified":"2026-07-28T13:51:15.333Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:00.11477Z"}],"euvd":[{"id":"EUVD-2026-49629","description":"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.","status":"published","published":"2026-07-27T21:21:16Z","modified":"2026-07-28T13:51:15Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:02:31.827348Z"}],"ghsa":[{"id":"GHSA-h8fp-f39c-q6mh","title":"React Router: RSCErrorHandler Missing Protocol Validation (XSS)","description":"This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62.  React Router was alerted of a code path in the (unstable) RSC error handling path in which redirects from untrusted sources could still result in an XSS vector via attacker-supplied redirect targets\n\n\u003e [!NOTE]\n\u003e This only affects your application if you are using the unstable RSC APIs","status":"published","published":"2026-07-23T19:35:57Z","modified":"2026-07-23T19:35:59Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:40:52.46233Z"}],"nvd":[{"id":"CVE-2026-53667","description":"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.","status":"published","published":"2026-07-27T22:17:31.093Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:33.249634Z"}],"osv":[{"id":"CVE-2026-53667","title":"React Router: Cross-site Scripting is Possible due to Missing RSCErrorHandler Protocol Validation (Incomplete fix for CVE-2026-53667)","description":"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.","status":"published","published":"2026-07-27T21:21:16.084Z","modified":"2026-10-28T02:30:53.342405186Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:08.132336Z"},{"id":"GHSA-h8fp-f39c-q6mh","title":"React Router: RSCErrorHandler Missing Protocol Validation (XSS)","description":"This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62.  React Router was alerted of a code path in the (unstable) RSC error handling path in which redirects from untrusted sources could still result in an XSS vector via attacker-supplied redirect targets\n\n\u003e [!NOTE]\n\u003e This only affects your application if you are using the unstable RSC APIs","status":"published","published":"2026-07-23T19:35:57Z","modified":"2026-09-10T03:50:52.3234925Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:48.920784Z"},{"id":"CLSA-2026-1791465168","title":"TuxCare security update for react-router (4 CVEs)","description":"TuxCare rebuilt react-router to address 4 CVEs. Fixed in 7.15.0-tuxcare.1.","status":"published","published":"2026-10-08T13:12:48Z","modified":"2026-10-17T19:01:21.226787593Z","updated_at":"2026-11-02T15:43:49.016976Z"},{"id":"CLSA-2026-1792191744","title":"TuxCare security update for react-router (4 CVEs)","description":"TuxCare rebuilt react-router to address 4 CVEs. Fixed in 7.14.2-tuxcare.1.","status":"published","published":"2026-10-16T23:02:24Z","modified":"2026-10-26T13:21:31Z","updated_at":"2026-11-02T15:43:51.747192Z"},{"id":"CLSA-2026-1792253402","title":"TuxCare security update for react-router-dom (4 CVEs)","description":"TuxCare rebuilt react-router-dom to address 4 CVEs. Fixed in 7.15.0-tuxcare.1.","status":"published","published":"2026-10-17T16:09:58Z","modified":"2026-10-17T19:00:57.374661978Z","updated_at":"2026-11-02T15:43:52.011757Z"},{"id":"CLSA-2026-1792253416","title":"TuxCare security update for react-router-dom (4 CVEs)","description":"TuxCare rebuilt react-router-dom to address 4 CVEs. Fixed in 7.14.2-tuxcare.1.","status":"published","published":"2026-10-17T16:10:13Z","modified":"2026-10-17T19:01:42.615026866Z","updated_at":"2026-11-02T15:43:52.011757Z"},{"id":"CLSA-2026-1793102180","title":"TuxCare security update for react-router (5 CVEs)","description":"TuxCare rebuilt react-router to address 5 CVEs. Fixed in 7.13.1-tuxcare.2.","status":"published","published":"2026-10-27T11:56:20Z","modified":"2026-11-06T13:28:06.223566287Z","updated_at":"2026-11-06T13:44:09.891978Z"},{"id":"CLSA-2026-1793810913","title":"TuxCare security update for react-router (2 CVEs)","description":"TuxCare rebuilt react-router to address 2 CVEs. Fixed in 7.14.1-tuxcare.4.","status":"published","published":"2026-11-04T17:48:33Z","modified":"2026-11-04T19:00:36.289933535Z","updated_at":"2026-11-04T19:15:03.6858Z"},{"id":"ROOT-APP-NPM-CVE-2026-53667","title":"CVE-2026-53667 in react-router - Patched by Root","description":"Root has patched CVE-2026-53667 in the react-router package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-08-11T12:47:31Z","modified":"2026-08-11T13:30:03.420340633Z","updated_at":"2026-11-02T15:53:27.649662Z"}]}}