{"action":"Upgrade react-router to 7.14.2 or later.","affected":[{"fixed":"7.14.2","introduced":"7.0.0"}],"component":"react-router","cve_ids":["CVE-2026-42211"],"ecosystem":"npm","epss":0.00416,"exploited":false,"fixed_versions":["7.14.2"],"ghsa_id":"GHSA-49rj-9fvp-4h2h","id":"tcs_01M5KF00EDJVK4ZKMNNZ8QNBP6","modified_at":"2026-09-10T03:50:48.070316980Z","published_at":"2026-06-03T21:03:32Z","references":["https://osv.dev/vulnerability/GHSA-49rj-9fvp-4h2h","https://github.com/remix-run/react-router/security/advisories/GHSA-49rj-9fvp-4h2h","https://nvd.nist.gov/vuln/detail/CVE-2026-42211","https://github.com/remix-run/react-router"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"GHSA-49rj-9fvp-4h2h","url":"https://osv.dev/vulnerability/GHSA-49rj-9fvp-4h2h"}],"summary":"React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_ERROR deserialization leading to Unauth RCE"}