An authentication bypass vulnerability in the authentik Source stage allows unauthenticated attackers to bypass security checks by sending an empty PO...
Description
An authentication bypass vulnerability in the authentik Source stage allows unauthenticated attackers to bypass security checks by sending an empty POST request.
AI Analyst Comment
Remediation
Update Unknown Multiple Products to the latest version. Monitor for exploitation attempts and review access logs.
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VENDOR: authentik
PRODUCT: authentik
AFFECTED_VERSIONS: Prior to 2025.12.6, 2026.2.4, and 2026.5.1
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Description Summary:
An authentication bypass vulnerability in the authentik Source stage allows unauthenticated attackers to bypass security checks by sending an empty POST request.
Executive Summary:
A critical authentication bypass in the authentik identity provider allows unauthenticated attackers to potentially gain unauthorized access to protected services.
Vulnerability Details
CVE-ID: CVE-2026-49448
Affected Software: authentik
Affected Versions: Prior to 2025.12.6, 2026.2.4, and 2026.5.1
Vulnerability: The vulnerability exists in the Source stage of the authentik identity provider. An unauthenticated attacker can bypass the intended authentication flow simply by submitting an empty POST request, effectively circumventing identity verification.
Business Impact
With a CVSS score of 9.8, this flaw is extremely critical as it undermines the foundation of identity and access management. Unauthorized access to the identity provider can lead to a complete compromise of all downstream applications integrated with authentik, resulting in massive data breaches and loss of control over organizational resources.
Remediation Plan
Immediate Action: Upgrade all instances of authentik to versions 2025.12.6, 2026.2.4, 2026.5.1, or later immediately.
Proactive Monitoring: Review authentication logs for anomalous login patterns or spikes in empty POST requests targeting the Source stage.
Compensating Controls: Implement additional network-level access controls or WAF rules to block malformed or unexpected requests directed at the identity provider's authentication endpoints.
Exploitation Status
Public Exploit Available: Unknown
Analyst Notes: As of June 2, 2026, there is no public information indicating active exploitation of this vulnerability. However, due to the ease of exploitation and the criticality of the target, the potential for exploitation is high.
Analyst Recommendation
This vulnerability is a high-severity authentication bypass that should be remediated immediately. Given that it affects the identity provider, any delay in patching significantly increases the risk of unauthorized access across the entire integrated application ecosystem.