{"cve":"CVE-2026-34077","nvd":{"published":"2026-06-02T20:16:34.620","modified":"2026-07-22T19:10:00.120","status":"Analyzed","description":"React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://github.com/remix-run/react-router/security/advisories/GHSA-rxv8-25v2-qmq8"],"products":["shopify:react-router","turbo-stream:turbo_stream"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-34077","score":0.00294,"percentile":0.22102,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-rxv8-25v2-qmq8","url":"https://osv.dev/vulnerability/GHSA-rxv8-25v2-qmq8","summary":"React Router vulnerable to Denial of Service via reflected user input in single-fetch","modified":"2026-06-04T15:41:24.712338Z","packages":[{"ecosystem":"npm","name":"react-router","purl":"pkg:npm/react-router","ranges":[">=7.0.0 <7.14.0"],"fixed":["7.14.0"]},{"ecosystem":"npm","name":"turbo-stream","purl":"pkg:npm/turbo-stream","ranges":["<3.0.0"],"fixed":["3.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}