{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-25748", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-05T18:35:52.356Z", "datePublished": "2026-02-12T19:36:45.631Z", "dateUpdated": "2026-02-12T19:36:45.631Z"}, "containers": {"cna": {"title": "authentik has a forward authentication bypass with broken cookie", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp"}, {"name": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4"}, {"name": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4"}], "affected": [{"vendor": "goauthentik", "product": "authentik", "versions": [{"version": ">= 2025.10.0-rc1, < 2025.10.4", "status": "affected"}, {"version": ">= 2025.10.0-rc1, < 2025.12.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-02-12T19:36:45.631Z"}, "descriptions": [{"lang": "en", "value": "authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue."}], "source": {"advisory": "GHSA-fj56-5763-j8pp", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue."}], "id": "CVE-2026-25748", "lastModified": "2026-02-12T20:16:10.473", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-02-12T20:16:10.473", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}