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CVE PROGRAM SOURCE RECORD7.2 High

CVE-2026-41567

Docker: `PUT /containers/{id}/archive` executes container binary on the host

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

moby moby/v2/daemon

  • < 2.0.0-beta.14affected

moby Docker Engine

  • < 29.5.1affected

docker docker/daemon

  • <= 28.5.2affected

References