CVE-2026-55494CWE-284broken-access-control

CVE-2026-55494

Critical · published September 30, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
50.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00640 · 50.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-09-30T21:16Z
References (4)
https://github.com/Quenary/tugtainer/commit/0052a5544e187a4d12f771838a8a23ca4afb61cd · [email protected]https://github.com/Quenary/tugtainer/releases/tag/v1.30.4 · [email protected]https://github.com/Quenary/tugtainer/security/advisories/GHSA-wgw2-c96g-p7h7 · [email protected]https://github.com/Quenary/tugtainer/security/advisories/GHSA-wgw2-c96g-p7h7 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 02 OCT 03:44Z
    EPSS moved — → 1%
    epss
  • 30 SEP 16:58Z
    Tugtainer: Unauthenticated access to Tugtainer Agent Docker management APIs when AGENT_SECRET is unset
    cvelistv5