FKIE_CVE-2026-94612

Vulnerability from fkie_nvd - Published: 2026-09-24 17:17 - Updated: 2026-09-24 19:39
Severity
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that Source. The SAML Source also does not record already accepted assertions, allowing replay. An unauthenticated actor who possesses such a valid assertion can use an assertion intended for another service provider or reuse an earlier assertion to authenticate as the user named by the assertion. Only SAML Sources are affected; SAML Providers and other Source types are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2.
References
security-advisories@github.comhttps://docs.goauthentik.io/releases/2026.2#fixed-in-202627
security-advisories@github.comhttps://docs.goauthentik.io/releases/2026.5#fixed-in-202657
security-advisories@github.comhttps://docs.goauthentik.io/releases/2026.8#fixed-in-202682
security-advisories@github.comhttps://github.com/goauthentik/authentik/commit/287ea13cdc23c378abc20a7b71c9c7919a19a89a
security-advisories@github.comhttps://github.com/goauthentik/authentik/commit/355d8cc3d755fbba05fc5fa90ffbcbe6469acddd
security-advisories@github.comhttps://github.com/goauthentik/authentik/commit/54fac864a0b3bc00551af1908f662b3bf5cc6135
security-advisories@github.comhttps://github.com/goauthentik/authentik/commit/984b0162711f0d1988ed33544d0a671c93e4ec76
security-advisories@github.comhttps://github.com/goauthentik/authentik/pull/25957
security-advisories@github.comhttps://github.com/goauthentik/authentik/pull/25962
security-advisories@github.comhttps://github.com/goauthentik/authentik/pull/25967
security-advisories@github.comhttps://github.com/goauthentik/authentik/pull/25972
security-advisories@github.comhttps://github.com/goauthentik/authentik/releases/tag/version/2026.2.7
security-advisories@github.comhttps://github.com/goauthentik/authentik/releases/tag/version/2026.5.7
security-advisories@github.comhttps://github.com/goauthentik/authentik/releases/tag/version/2026.8.2
security-advisories@github.comhttps://github.com/goauthentik/authentik/security/advisories/GHSA-cqj8-fxxf-9pg7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "authentik",
          "vendor": "goauthentik",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2026.2.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 2026.5.0, \u003c 2026.5.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 2026.8.0, \u003c 2026.8.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion\u0027s signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that Source. The SAML Source also does not record already accepted assertions, allowing replay. An unauthenticated actor who possesses such a valid assertion can use an assertion intended for another service provider or reuse an earlier assertion to authenticate as the user named by the assertion. Only SAML Sources are affected; SAML Providers and other Source types are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2."
    }
  ],
  "id": "CVE-2026-94612",
  "lastModified": "2026-09-24T19:39:45.600",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-94612",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-24T17:15:17.274740Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-24T17:17:17.557",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://docs.goauthentik.io/releases/2026.2#fixed-in-202627"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://docs.goauthentik.io/releases/2026.5#fixed-in-202657"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://docs.goauthentik.io/releases/2026.8#fixed-in-202682"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/commit/287ea13cdc23c378abc20a7b71c9c7919a19a89a"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/commit/355d8cc3d755fbba05fc5fa90ffbcbe6469acddd"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/commit/54fac864a0b3bc00551af1908f662b3bf5cc6135"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/commit/984b0162711f0d1988ed33544d0a671c93e4ec76"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/pull/25957"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/pull/25962"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/pull/25967"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/pull/25972"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-cqj8-fxxf-9pg7"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        },
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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