CVE-2026-55181: CWE-284: Improper Access Control in Quenary tugtainer
Tugtainer versions prior to 1.30.3 have an improper access control vulnerability where the OIDC authentication flow can be initiated even if OIDC is disabled via configuration. Although the /auth/oidc/enabled endpoint correctly reports OIDC as disabled, a direct request to /auth/oidc/login bypasses this and starts the login flow, potentially allowing unauthorized access. This issue has been fixed in version 1.30.3.
AI Analysis
Technical Summary
CVE-2026-55181 describes an improper access control vulnerability (CWE-284) in Quenary's Tugtainer, a self-hosted Docker container update automation app. In versions before 1.30.3, the OIDC authentication can be triggered even when disabled (OIDC_ENABLED=false). The endpoint /auth/oidc/enabled correctly indicates OIDC is disabled, but /auth/oidc/login still initiates the OIDC login flow, returning HTTP 302, setting an oidc_state cookie, and redirecting to the OIDC authorization endpoint. This bypasses the intended disable switch and could lead to unauthorized authentication flows. The vulnerability is patched in version 1.30.3.
Potential Impact
This vulnerability allows an attacker to bypass the intended disablement of OIDC authentication, potentially enabling unauthorized initiation of the OIDC login process. Given the CVSS score of 9.4 with high confidentiality and integrity impact, exploitation could lead to significant unauthorized access or compromise of authentication mechanisms. Availability impact is low. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Tugtainer to version 1.30.3 or later, where this vulnerability has been patched. No other mitigation is required as the fix addresses the improper access control issue directly.
CVE-2026-55181: CWE-284: Improper Access Control in Quenary tugtainer
Description
Tugtainer versions prior to 1.30.3 have an improper access control vulnerability where the OIDC authentication flow can be initiated even if OIDC is disabled via configuration. Although the /auth/oidc/enabled endpoint correctly reports OIDC as disabled, a direct request to /auth/oidc/login bypasses this and starts the login flow, potentially allowing unauthorized access. This issue has been fixed in version 1.30.3.
CVSS v3.1
Score 9.4critical
Affected software
Quenary
tugtainer
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55181 describes an improper access control vulnerability (CWE-284) in Quenary's Tugtainer, a self-hosted Docker container update automation app. In versions before 1.30.3, the OIDC authentication can be triggered even when disabled (OIDC_ENABLED=false). The endpoint /auth/oidc/enabled correctly indicates OIDC is disabled, but /auth/oidc/login still initiates the OIDC login flow, returning HTTP 302, setting an oidc_state cookie, and redirecting to the OIDC authorization endpoint. This bypasses the intended disable switch and could lead to unauthorized authentication flows. The vulnerability is patched in version 1.30.3.
Potential Impact
This vulnerability allows an attacker to bypass the intended disablement of OIDC authentication, potentially enabling unauthorized initiation of the OIDC login process. Given the CVSS score of 9.4 with high confidentiality and integrity impact, exploitation could lead to significant unauthorized access or compromise of authentication mechanisms. Availability impact is low. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Tugtainer to version 1.30.3 or later, where this vulnerability has been patched. No other mitigation is required as the fix addresses the improper access control issue directly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T15:20:43.086Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd446a2a4e24523d49ff19
Added to database: 09/30/2026, 17:18:34 UTC
Last enriched: 09/30/2026, 17:33:03 UTC
Last updated: 09/30/2026, 17:33:03 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.