CVE-2026-49448 PUBLISHED

authentik: SourceStage bypass via empty POST

Assigner: GitHub_M
Reserved: 30.05.2026 Published: 02.06.2026 Updated: 03.06.2026

authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	goauthentik
Product	authentik
Versions	Version < 2025.12.6 is affected Version < 2026.2.4 is affected Version < 2026.5.1 is affected

References

https://github.com/goauthentik/authentik/security/advisories/GHSA-xp7f-xjjx-gwm8

Problem Types

CWE-287: Improper Authentication CWE