Incorrect authorization in authentik - #VU132752
Published: May 29, 2026
Vulnerability identifier: #VU132752
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Authentik Security Inc
Affected software:
authentik
authentik
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authentication.
The vulnerability exists due to improper access control in SourceStageView.dispatch() and ChallengeStageView.post() when handling an empty POST request while the Source stage is active. A remote attacker can send an empty POST request to bypass authentication.
Exploitation is possible when a Source stage is bound to a flow, the source exposes a ui_login_button, and the attacker can reach the Source stage.
Remediation
Install security update from vendor's website.