---
id: CVE-2026-55181
title: Tugtainer is a self-hosted app for automating updates of Docker containers
summary: >-
  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 t…
severity: critical
cvss: 9.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'
cwe:
  - CWE-284
vendor: Quenary
product: tugtainer
affected:
  - tugtainer < 1.30.3
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T20:17:33.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55181'
references:
  - url: >-
      https://github.com/Quenary/tugtainer/commit/76371db679334b002d4af544b0f3b8587ad86f52
    label: security-advisories@github.com
  - url: 'https://github.com/Quenary/tugtainer/releases/tag/v1.30.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Quenary/tugtainer/security/advisories/GHSA-rg7c-vpfp-2w43
    label: security-advisories@github.com
  - url: >-
      https://github.com/Quenary/tugtainer/security/advisories/GHSA-rg7c-vpfp-2w43
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-30T19:50:35.786345Z'
ingestedAt: '2026-09-30T17:13:20.832Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.