CVE-2026-49448CWE-287

authentik: SourceStage bypass via empty POST

Critical · published June 2, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
47.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00584 · 47.2th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-06-02T20:31Z
EPSS history
Timeline
  • 02 JUN 20:31Z
    authentik: SourceStage bypass via empty POST
    cvelistv5