CVE-2026-55181 Details
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.
A vulnerability in Tugtainer, a self-hosted application for automating Docker container updates, allows the OpenID Connect (OIDC) authentication process to be initiated even when OIDC is disabled in the configuration. This issue affects Tugtainer versions prior to 1.30.3. The vulnerability arises because the OIDC login endpoint can be accessed directly, bypassing the intended disablement, and redirecting users to the OIDC authorization endpoint. As a result, users may inadvertently complete the OIDC login flow and gain access to a Tugtainer session, contrary to the administrator's intentions.
Users can update to Tugtainer version 1.30.3 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 30, 2026CISA-ADP
Assessed Sep 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Quenary/tugtainer/security/advisories/GHSA-rg7c-vpfp-2w43 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/Quenary/tugtainer/commit/76371db679334b002d4af544b0f3b8587ad86f52 | [email protected] | Source CodeVendor |
| https://github.com/Quenary/tugtainer/releases/tag/v1.30.3 | [email protected] | Release NotesVendor |
| https://github.com/Quenary/tugtainer/security/advisories/GHSA-rg7c-vpfp-2w43 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Quenary Tugtainer | <= 1.30.2 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 30, 2026 | CVE Modified | CISA-ADP |
| Sep 30, 2026 | New CVE Received | [email protected] |