{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-25478","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-02-02T16:31:35.820Z","datePublished":"2026-02-09T18:46:56.445Z","dateUpdated":"2026-02-10T16:01:16.807Z"},"containers":{"cna":{"title":"Litestar has a CORS origin allowlist bypass due to unescaped regex metacharacters in allowed origins","problemTypes":[{"descriptions":[{"cweId":"CWE-942","lang":"en","description":"CWE-942: Permissive Cross-domain Policy with Untrusted Domains","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/litestar-org/litestar/security/advisories/GHSA-2p2x-hpg8-cqp2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/litestar-org/litestar/security/advisories/GHSA-2p2x-hpg8-cqp2"},{"name":"https://github.com/litestar-org/litestar/commit/eb87703b309efcc0d1b087dcb12784e76b003d5a","tags":["x_refsource_MISC"],"url":"https://github.com/litestar-org/litestar/commit/eb87703b309efcc0d1b087dcb12784e76b003d5a"},{"name":"https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0","tags":["x_refsource_MISC"],"url":"https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0"},{"name":"https://github.com/litestar-org/litestar/releases/tag/v2.20.0","tags":["x_refsource_MISC"],"url":"https://github.com/litestar-org/litestar/releases/tag/v2.20.0"}],"affected":[{"vendor":"litestar-org","product":"litestar","versions":[{"version":"< 2.20.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-02-09T18:46:56.445Z"},"descriptions":[{"lang":"en","value":"Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because metacharacters are not escaped, a malicious origin can match unexpectedly. The check relies on allowed_origins_regex.fullmatch(origin). This vulnerability is fixed in 2.20.0."}],"source":{"advisory":"GHSA-2p2x-hpg8-cqp2","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-10T15:30:25.275815Z","id":"CVE-2026-25478","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2026-02-10T16:01:16.807Z"}}]}}