DockerCVE-2026-17106
Docker CLI: link following
High7.1CVE-2026-17106 · Published Aug 18, 2026 · updated Aug 28, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Docker CLI Product | < 29.7.0 | 29.7.0 |
| Docker Compose Product | < 5.4.0 | 5.4.0 |
| Docker Desktop Product | < 4.86.0 | 4.86.0 |
| Docker Engine Product | < 29.7.0 | 29.7.0 |
| Docker Sandboxes Product | < 0.38.0 | 0.38.0 |
| go-archive Product | < 0.3.0 | 0.3.0 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-59
- www.cve.org/CVERecord?id=CVE-2026-17106
- nvd.nist.gov/vuln/detail/CVE-2026-17106
- docs.docker.com/desktop/release-notes/#4860
- docs.docker.com/engine/release-notes/29/#2970
- github.com/docker/cli/releases/tag/v29.7.0
- github.com/docker/compose/releases/tag/v5.4.0
- github.com/docker/sbx-releases/releases/tag/v0.38.0
- github.com/moby/go-archive/releases/tag/v0.3.0
- github.com/moby/go-archive/security/advisories/GHSA-hfg8-hc9c-6c3h
- github.com/masasron/CopyEscape-CVE-2026-17106
More Docker advisories
All Docker| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 15 | Docker Sandboxes: code execution | Critical9.4 | 0.42.0 |
| Aug 12 | Docker Sandboxes: improper authorization | Medium5.7 | No fix yet |
| Jul 21 | Docker BuildKit: improper input validation | Medium6.0 | 0.31.2 |
| Jul 21 | Docker BuildKit: argument injection | High7.3 | No fix yet |
| Jul 21 | Docker BuildKit: authentication bypass | Medium6.9 | 0.31.2 |
| Jul 21 | Docker BuildKit: path traversal | Low1.8 | 0.31.2 |