CVEvulnerability

CVE-2026-47201

8.5 HIGH Published 2026-06-02 Modified 2026-07-22 Official page ↗
Status
Analyzed
Published
2026-06-02
Last modified
2026-07-22
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-20, CWE-347

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.

Affected configurations

• goauthentik authentik (< 2025.12.6) • goauthentik authentik (>= 2026.2.0 < 2026.2.4) • goauthentik authentik (>= 2026.5.0 < 2026.5.1)

Related

Weakness · CWE (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-347 Improper Verification of Cryptographic Signature weakness

References