CVE-2026-55494

Tugtainer is a self-hosted app for automating updates of Docker containers. Prior to version 1.30.4, Tugtainer Agent allows unauthenticated access to Docker management APIs when AGENT_SECRET is not configured. The Agent uses request signatures to protect its API routes. However, in agent/auth.py, the signature verification function returns successfully if Config.AGENT_SECRET is empty. This causes protected Agent APIs to become accessible without authentication. This issue has been patched in version 1.30.4.

• CWE-284

• https://github.com/Quenary/tugtainer/commit/0052a5544e187a4d12f771838a8a23ca4afb61cd
• https://github.com/Quenary/tugtainer/releases/tag/v1.30.4
• https://github.com/Quenary/tugtainer/security/advisories/GHSA-wgw2-c96g-p7h7
• https://github.com/Quenary/tugtainer/security/advisories/GHSA-wgw2-c96g-p7h7

Published

Sep 30, 2026

Last Modified

Sep 30, 2026

Status

Deferred

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