{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-25479", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-02T16:31:35.821Z", "datePublished": "2026-02-09T18:48:19.971Z", "dateUpdated": "2026-02-09T18:48:19.971Z"}, "containers": {"cna": {"title": "Litestar has an AllowedHosts validation bypass due to unescaped regex metacharacters in configured host patterns", "problemTypes": [{"descriptions": [{"cweId": "CWE-185", "lang": "en", "description": "CWE-185: Incorrect Regular Expression", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4"}, {"name": "https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace", "tags": ["x_refsource_MISC"], "url": "https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace"}, {"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": "2026-02-09T18:48:19.971Z"}, "descriptions": [{"lang": "en", "value": "Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0."}], "source": {"advisory": "GHSA-93ph-p7v4-hwh4", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0."}], "id": "CVE-2026-25479", "lastModified": "2026-02-09T21:55:30.093", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-02-09T20:15:57.177", "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/06b36f481d1bfea6f19995cfb4f203aba45c4ace"}, {"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-93ph-p7v4-hwh4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-185"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}