Tugtainer: OIDC login remains accessible when OIDC_ENABLED is false (CVE-2026-55181) | HOL Guard CVE

Critical · CVSS 9.4CVE-2026-55181

Tugtainer: OIDC login remains accessible when OIDC_ENABLED is false

Answer in brief

CVE-2026-55181 records a Critical severity (CVSS 9.4) vulnerability in Tugtainer: OIDC login remains accessible when OIDC_ENABLED is false. The current sources do not mark it as known exploited. The current feed maps Quenary/tugtainer (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 30, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Quenary/tugtainer (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Quenary/tugtainergeneric	<1.30.3	1.30.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for Quenary/tugtainer.
Review the reported fix. Update Quenary/tugtainer to 1.30.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.