CVE-2026-55181CWE-284broken-access-control

CVE-2026-55181

Critical · published September 30, 2026

CVSS v3.1
9.4
EPSS
1%
Percentile
48.0
In the wild
Unconfirmed
What it is

Tugtainer is a self-hosted app for automating updates of Docker containers. Prior to version 1.30.3, Tugtainer's OIDC authentication can still be initiated even when OIDC_ENABLED=false. The /auth/oidc/enabled endpoint correctly reports that OIDC is disabled. However, a direct request to /auth/oidc/login still starts the OIDC login flow, returns HTTP 302, sets an oidc_state cookie, and redirects the user to the configured OIDC authorization endpoint. This bypasses the intended OIDC disable switch. This issue has been patched in version 1.30.3.

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00598 · 48.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-09-30T21:16Z
References (4)
EPSS history
Timeline
  • 02 OCT 03:44Z
    EPSS moved — → 1%
    epss
  • 30 SEP 16:57Z
    Tugtainer: OIDC login remains accessible when OIDC_ENABLED is false
    cvelistv5