{"id":"CVE-2026-53666","revision":"6de56ab27c5e4740a2d5793f841278fb","records":[{"revision":"6de56ab27c5e4740a2d5793f841278fb","observedAt":"2026-10-25T13:17:16.273+00:00","statement":{"source":"nvd","id":"CVE-2026-53666","aliases":[],"title":"React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an…","description":"React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on the client, which would in turn trigger an outbound network request. This is only possible with very specific (and unlikely) application-layer code. Note that this does not impact an application if it is using Declarative Mode. It only impacts Framework Mode and Data Mode applications that perform manual SSR/hydration. This issue has been fixed in version 7.18.0.","state":0,"publishedAt":"2026-07-27T22:17:30.937+00:00","modifiedAt":"2026-10-24T13:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180","https://github.com/remix-run/react-router/commit/9d22943fd46c8ae4b08236425fa3549e10e9ad1a","https://github.com/remix-run/react-router/pull/15175","https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0","https://github.com/remix-run/react-router/security/advisories/GHSA-337j-9hxr-rhxg"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53666","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-470"],"productCriteria":["cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-07-27T22:17:30.937","lastModified":"2026-10-24T13:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-53666","identifiers":["CVE-2026-53666"]},"retained":false,"historicalAffected":[]}],"coverage":[]}