CVE-2026-55494

critical · 9.8

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.

9.8

CVSS

0.8%

EPSS (exploit prob.)

53rd

EPSS percentile

2026-09-30

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-284

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-55494