VULNERABILITY INTELLIGENCE

CVE-2026-47201

CVSS score8.5 HIGH
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-06-02
Last modified2026-07-22
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Description

authentik is an open-source identity provider. Prior to versions 2025.12.5, 2026.2.3, and 2026.5.1, authentik's SAML Source ACS endpoint is vulnerable to XML Signature Wrapping when validating upstream SAML responses. An attacker with any account at the upstream IdP can reuse a valid signed assertion to authenticate as another federated user. This issue has been patched in versions 2025.12.5, 2026.2.3, and 2026.5.1.

Weakness classification

  • security-advisories@github.com: CWE-20
  • nvd@nist.gov: CWE-347

Primary references