high7.2

CVE-2026-41567

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

Impact

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 packages

Ecosystem	Package	Affected	Fixed in
go	`github.com/moby/moby/v2`	< 2.0.0-beta.14	2.0.0-beta.14
go	`github.com/docker/docker`	<= 28.5.2	none recorded
go	`github.com/moby/moby`	<= 28.5.2	none recorded

Weakness classification

CWE-427

Impact

Affected packages

Weakness classification

References