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CVE-2026-47201

nvd nist
Published: Jun 2, 2026Modified: Jul 22, 2026

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8.5
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 6.0
Source: security-advisories@github.com (Secondary)

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 (3)

Goauthentik
1 product
Authentik
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Goauthentik
Authentik
Before 2025.12.6
Authentik
From 2026.2.0 to 2026.2.4
Authentik
From 2026.5.0 to 2026.5.1

Related CWEs

CWE-20
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CWE-347
Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.

References (1)

Source: security-advisories@github.com
MitigationVendor Advisory

Timeline

No history available yet.