REDHAT-BUG-2485356: High severity Docker Docker Engine vulnerability

Published Jun 5, 2026
·
Updated

Moby is an open source container framework. In versions prior to 29.5.1 and in moby/moby v2 prior to v2.0.0-beta.14, when a compressed archive is uploaded to a container via PUT /containers/{id}/archive or piped through docker cp -, the daemon resolves decompression binaries (such as xz or unpigz) from the container's filesystem rather than the host's due to incorrect ordering of operations. A malicious container image containing a trojanized decompression binary can achieve arbitrary code execution with full daemon privileges, including host root UID and unrestricted capabilities, when a user uploads a compressed (xz or gzip) archive into that container. This issue is fixed in Docker Engine 29.5.1 and moby/moby v2.0.0-beta.14. Workarounds include only running containers from trusted images, using authorization plugins to restrict access to the PUT /containers/{id}/archive endpoint, and avoiding piping compressed archives into containers created from untrusted images

Affected Software

2 affected components
Docker Docker Engine<29.5.1
moby/moby<v2.0.0-beta.14

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Docker Engine to a version that resolves this vulnerability.

    Fixed in 29.5.1
  2. Upgrade

    Upgrade moby/moby to a version that resolves this vulnerability.

    Fixed in v2.0.0-beta.14
  3. Compensating control

    Use authorization plugins to restrict access to the `PUT /containers/{id}/archive` endpoint.

  4. Compensating control

    Only run containers from trusted images, and avoid piping compressed archives into containers created from untrusted images (e.g., avoid `docker cp -` with xz/gzip content into such containers).

Event History

Jun 5, 2026
Data Sourced
via Red Hat·02:01 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2485356?

The severity of REDHAT-BUG-2485356 is high with a score of 7.

2

What versions are affected by REDHAT-BUG-2485356?

REDHAT-BUG-2485356 affects versions of Moby prior to 29.5.1 and moby/moby v2 prior to v2.0.0-beta.14.

3

How do I fix REDHAT-BUG-2485356?

To fix REDHAT-BUG-2485356, upgrade to Moby version 29.5.1 or later and moby/moby version v2.0.0-beta.14 or later.

4

What types of attacks does REDHAT-BUG-2485356 potentially allow?

REDHAT-BUG-2485356 potentially allows attackers to gain unintended access to decompression binaries and execute arbitrary commands.

5

What is the main issue described in REDHAT-BUG-2485356?

The main issue in REDHAT-BUG-2485356 is that the container daemon incorrectly resolves decompression binaries when a compressed archive is uploaded.

Contact

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