{"id":"CVE-2026-33244","state":"PUBLISHED","title":"React Router has stored XSS via unescaped Location header in prerendered redirect HTML","description":"React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP `Location` header value can permit Cross-Site Scripting (XSS) in the statically generated HTML files if the redirect location comes from an untrusted source. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.13.2.","publishedAt":"2026-06-02T16:59:31.104Z","updatedAt":"2026-06-02T17:28:13.207Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["remix-run react-router"],"affected":[{"vendor":"remix-run","product":"react-router","versions":[{"version":">= 7.5.1, < 7.13.2","status":"affected"}]}],"references":["https://github.com/remix-run/react-router/security/advisories/GHSA-f22v-gfqf-p8f3"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33244.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33244","state":"PUBLISHED","datePublished":"2026-06-02T16:59:31.104Z","dateUpdated":"2026-06-02T17:28:13.207Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-18T02:42:27.509Z"},"containers":{"cna":{"title":"React Router has stored XSS via unescaped Location header in prerendered redirect HTML","descriptions":[{"lang":"en","value":"React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP `Location` header value can permit Cross-Site Scripting (XSS) in the statically generated HTML files if the redirect location comes from an untrusted source. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.13.2."}],"affected":[{"vendor":"remix-run","product":"react-router","versions":[{"version":">= 7.5.1, < 7.13.2","status":"affected"}]}],"references":[{"url":"https://github.com/remix-run/react-router/security/advisories/GHSA-f22v-gfqf-p8f3","name":"https://github.com/remix-run/react-router/security/advisories/GHSA-f22v-gfqf-p8f3","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-02T16:59:31.104Z"},"source":{"advisory":"GHSA-f22v-gfqf-p8f3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-02T17:28:07.247227Z","id":"CVE-2026-33244","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-02T17:28:13.207Z"}}]}}}