Incorrect authorization in authentik - CVE-2026-49448
Published: May 29, 2026
Vulnerability identifier: #VU132752
CSH Severity: High
CVSS v4: 9.3 [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]
CVE-ID: CVE-2026-49448
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
authentik
How to mitigate CVE-2026-49448
Install security update from vendor's website.
authentik - addressed in versions 2025.12.6, 2026.2.4, 2026.5.2