CVE-2026-47201: high-severity vulnerability in goauthentik authentik
authentik: XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary federated user
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.5epss 0.2%
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
goauthentik · authentikRelated CVEs — goauthentik authentik
In the same product, most dangerous first.
CVE-2022-46145HIGHauthentik vulnerable to unauthorized user creation and potential account takeoverEPSS 1.3%CVE-2023-48228HIGHOAuth2: PKCE can be fully circumventedEPSS 1.2%CVE-2024-52289HIGHauthentik has an insecure default configuration for OAuth2 Redirect URIsEPSS 1.1%CVE-2022-23555CRITICALauthentik vulnerable to Improper Authentication via invitation URL token reuseEPSS 0.9%CVE-2026-25227CRITICALauthentik affected by Remote Code Execution via Context Key Injection in PropertyMapping Test EndpointEPSS 0.9%CVE-2023-46249CRITICALauthentik potential installation takeover when default admin user is deletedEPSS 0.8%