{"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": "2026-02-09T18:46:56.445Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-25478", "lastModified": "2026-02-09T20:15:57.017", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-02-09T20:15:57.017", "references": [{"source": "security-advisories@github.com", "url": "https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/litestar-org/litestar/commit/eb87703b309efcc0d1b087dcb12784e76b003d5a"}, {"source": "security-advisories@github.com", "url": "https://github.com/litestar-org/litestar/releases/tag/v2.20.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/litestar-org/litestar/security/advisories/GHSA-2p2x-hpg8-cqp2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-942"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}