{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40299","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-10T20:22:44.035Z","datePublished":"2026-04-17T20:49:05.642Z","dateUpdated":"2026-04-20T15:58:51.149Z"},"containers":{"cna":{"title":"next-intl has an open redirect vulnerability","problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/amannn/next-intl/security/advisories/GHSA-8f24-v5vv-gm5j","tags":["x_refsource_CONFIRM"],"url":"https://github.com/amannn/next-intl/security/advisories/GHSA-8f24-v5vv-gm5j"},{"name":"https://github.com/amannn/next-intl/pull/2304","tags":["x_refsource_MISC"],"url":"https://github.com/amannn/next-intl/pull/2304"},{"name":"https://github.com/amannn/next-intl/commit/1c80b668aa6d853f470319eec10a3f61e78a70e6","tags":["x_refsource_MISC"],"url":"https://github.com/amannn/next-intl/commit/1c80b668aa6d853f470319eec10a3f61e78a70e6"},{"name":"https://github.com/amannn/next-intl/releases/tag/v4.9.1","tags":["x_refsource_MISC"],"url":"https://github.com/amannn/next-intl/releases/tag/v4.9.1"}],"affected":[{"vendor":"amannn","product":"next-intl","versions":[{"version":"< 4.9.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-17T20:49:05.642Z"},"descriptions":[{"lang":"en","value":"next-intl provides internationalization for Next.js. Applications using the `next-intl` middleware prior to version 4.9.1with `localePrefix: 'as-needed'` could construct URLs where path handling and the WHATWG URL parser resolved a relative redirect target to another host (e.g. scheme-relative `//` or control characters stripped by the URL parser), so the middleware could redirect the browser off-site while the user still started from a trusted app URL. The problem has been patchedin `next-intl@4.9.1`."}],"source":{"advisory":"GHSA-8f24-v5vv-gm5j","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-20T15:56:01.407919Z","id":"CVE-2026-40299","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-20T15:58:51.149Z"}}]}}