High [CVE-2026-17106] The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, and the ApplyLayer helpers) do not confine filesystem operations to the destination directory
This high-severity Docker advisory covers CVE-2026-17106 affecting go-archive, Docker Sandboxes, Docker Desktop.
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Summary
The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, and the ApplyLayer helpers) do not confine filesystem operations to the destination directory.
The extractor decides where each archive entry lands using lexical string checks and then performs the filesystem operation on a path that is resolved by the OS, so links introduced by the archive can be followed out of the destination directory.
An attacker who controls the contents of an archive can create or overwrite files at arbitrary paths writable by the extracting process.
Affected products named by the advisory: Docker Sandboxes; Docker Desktop; Docker Engine; Docker CLI; and 1 more.
Affected products named by the advisory: Docker Compose.
- go-archive before 0.3.0
- Docker Sandboxes before 0.38.0
- Docker Desktop before 4.86.0
- Docker Engine before 29.7.0
- Docker CLI before 29.7.0
- Docker Compose before 5.4.0
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 0.3.0
- 0.38.0
- 4.86.0
- 29.7.0
- 5.4.0
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 0.3.0, 0.38.0, 4.86.0, 29.7.0, 5.4.0. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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