CVE-2026-47201
HIGH SEVERITYCVSS Score & Metrics
Base Score
8.5 / 10
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-20
Source
GitHub
Vendor
go
Product
goauthentik.io
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