CVE-2026-94613 (GCVE-0-2026-94613)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:13 – Updated: 2026-09-29 02:53
VLAI
Title
authentik: Denial of Service via Document Type Declarations in SAML Messages
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 02:53 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7771 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
goauthentik authentik Affected: < 2026.2.7
Affected: >= 2026.5.0, < 2026.5.7
Affected: >= 2026.8.0, < 2026.8.2
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            },
            {
              "name": "https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/goauthentik/authentik/releases/tag/version/2026.8.2"
            }
          ],
          "source": {
            "advisory": "GHSA-cxwx-9x59-28qm",
            "discovery": "UNKNOWN"
          },
          "title": "authentik: Denial of Service via Document Type Declarations in SAML Messages"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-94613",
        "datePublished": "2026-09-24T16:13:17.785Z",
        "dateReserved": "2026-09-21T21:32:23.741Z",
        "dateUpdated": "2026-09-29T02:53:23.285Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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