CVE-2026-49448

CRITICAL

authentik: SourceStage bypass via empty POST

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 9.8
EPSS 0.0031
EPSS Percentile 22.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-287
Status published
Products (3)
goauthentik/authentik < 2025.12.6 (2 CPE variants)
goauthentik/authentik < 2026.2.4
goauthentik/authentik < 2026.5.1
Published Jun 02, 2026
Tracked Since Jun 03, 2026