Authentik 2026.5.7 Security Advisory: Fixes for SSO, RBAC, CSRF, and CORS Vulnerabilities

Authentik 2026.5.7 Security Update Summary Vulnerability Overview This update fixes multiple security vulnerabilities, primarily involving: SSO Token Validation Flaw: Platform SSO token requests are not validated correctly, potentially leading to unauthorized access Password Policy Bypass: The password input field lacks required field validation, posing a risk of weak passwords CORS Configuration Error: CORS strategy request context pollution, potentially enabling cross-site attacks Email Header Injection: SMTP email recipient overwrite vulnerability, which may be exploited for phishing attacks Missing CSRF Protection: Improper handling of SCIM request exceptions, posing a risk of Cross-Site Request Forgery Privilege Escalation: Flaw in RBAC time comparison logic, potentially enabling privilege bypass Information Disclosure: Improper API access control, potentially exposing sensitive information Impact Scope Affected Versions: All versions prior to Authentik 2026.5.7 Affected Components: - Platform SSO Authentication Module - SCIM Connector - RBAC Permission System - SMTP Email Service - API Access Control - CORS Configuration - Password Policy Validation Remediation 1. Upgrade Version: Immediately upgrade to Authentik 2026.5.7 or a later version 2. Temporary Mitigation Measures (if immediate upgrade is not possible): - Strengthen SSO token validation logic - Enable strict CORS policies - Implement password strength policies - Add CSRF token validation - Restrict API access permissions - Monitor for anomalous email sending behavior Related PR Numbers #24588 (SSO Token Validation) #24651 (Password Policy) #25462 (CORS Configuration) #25896 (Email Header Injection) #24954 (SCIM Exception Handling) #24888 (RBAC Time Comparison) Notes This update includes 2405 commits; thorough testing is recommended before deploying to production environments Monitor official security announcements for subsequent patch information Enabling automatic update mechanisms is recommended to ensure timely acquisition of security fixes

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Authentik 2026.5.7 Security Advisory: Fixes for SSO, RBAC, CSRF, and CORS Vulnerabilities

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