CRITICAL

CVE-2026-55494

CVSS v3

9.8

CRITICAL

EPSS Score

0.8 %

exploit probability, as of 2026-10-01

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

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 ver

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-09-30
Last Modified: 2026-09-30

Frequently asked questions

What is CVE-2026-55494?

Is CVE-2026-55494 actively exploited?

Active exploitation of CVE-2026-55494 has not been confirmed. Its EPSS score was 0.8% on 2026-10-01, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-55494?

CVE-2026-55494 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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