Vulnerability from bitnami_vulndb
Published
2026-10-01 09:23
Modified
2026-10-01 09:55
Summary
authentik: Denial of Service via Document Type Declarations in SAML Messages
Details

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling /application/saml/ or /source/saml/, causing the requests assigned to that worker to fail. Worker process termination and automatic restart do not destroy database-backed sessions, but continued malicious messages can cause a sustained share of legitimate traffic to fail. Other protocol implementations are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "authentik",
        "purl": "pkg:bitnami/authentik"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.2.7"
            },
            {
              "introduced": "2026.5.0"
            },
            {
              "fixed": "2026.5.7"
            },
            {
              "introduced": "2026.8.0"
            },
            {
              "fixed": "2026.8.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-94613"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling /application/saml/* or /source/saml/*, causing the requests assigned to that worker to fail. Worker process termination and automatic restart do not destroy database-backed sessions, but continued malicious messages can cause a sustained share of legitimate traffic to fail. Other protocol implementations are not affected. This issue is fixed in versions 2026.2.7, 2026.5.7, and 2026.8.2.",
  "id": "BIT-authentik-2026-94613",
  "modified": "2026-10-01T09:55:18.588Z",
  "published": "2026-10-01T09:23:10.438Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://docs.goauthentik.io/releases/2026.2#fixed-in-202627"
    },
    {
      "type": "WEB",
      "url": "https://docs.goauthentik.io/releases/2026.5#fixed-in-202657"
    },
    {
      "type": "WEB",
      "url": "https://docs.goauthentik.io/releases/2026.8#fixed-in-202682"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/commit/03d19d63b8d8dd7bc3de7cf6e57c6df341a9fc86"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/commit/4cf2f803b1c2ef38c224eead375fd057a10ee8ac"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/commit/732adad26bb97361b6bf25ef138df5c16471ba1f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/commit/a029f5372295bfeb1e334855f78601681cdc9a2d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/pull/25959"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/pull/25964"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/pull/25969"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/pull/25974"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.2.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.5.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-cxwx-9x59-28qm"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94613"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "authentik: Denial of Service via Document Type Declarations in SAML Messages"
}



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