CVE-2026-25748

{"id": "CVE-2026-25748", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25748", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-02-17T15:52:54.989237Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "goauthentik", "product": "authentik", "versions": [{"status": "affected", "version": ">= 2025.10.0-rc1, < 2025.10.4"}, {"status": "affected", "version": ">= 2025.10.0-rc1, < 2025.12.4"}]}]}], "published": "2026-02-12T20:16:10.473", "references": [{"url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-287"}]}], "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."}, {"lang": "es", "value": "authentik es un proveedor de identidad de c\u00f3digo abierto. Antes de las versiones 2025.10.4 y 2025.12.4, con una cookie malformada era posible eludir la autenticaci\u00f3n al usar la autenticaci\u00f3n de reenv\u00edo en el Proveedor de Proxy de authentik cuando se utilizaba junto con Traefik o Caddy como proxy inverso. Cuando se utilizaba una cookie maliciosa, ninguno de los encabezados X-Authentik-* espec\u00edficos de authentik se establec\u00eda, lo que, dependiendo de la aplicaci\u00f3n, pod\u00eda conceder acceso a un atacante. authentik 2025.10.4 y 2025.12.4 solucionan este problema."}], "lastModified": "2026-06-17T10:25:09.800", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D68BD58B-CB50-411F-862F-FF4F4F984239", "versionEndExcluding": "2025.10.4"}, {"criteria": "cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A59D4BC9-5FAE-4A4F-A109-D754BD80A10C", "versionEndExcluding": "2025.12.4", "versionStartIncluding": "2025.12.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}