CVE-2026-17106CWE-59

CVE-2026-17106

published August 18, 2026

CVSS

7.1

EPSS

Percentile

37.2

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS: 7.1 · NONE
CVSS v4.0: 7.1 · 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
EPSS: 0.00440 · 37.2th percentile
Weakness: CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published: 2026-08-18T23:16Z

References (8)

https://docs.docker.com/desktop/release-notes/#4860 · [email protected]https://docs.docker.com/engine/release-notes/29/#2970 · [email protected]https://github.com/docker/cli/releases/tag/v29.7.0 · [email protected]https://github.com/docker/compose/releases/tag/v5.4.0 · [email protected]https://github.com/docker/sbx-releases/releases/tag/v0.38.0 · [email protected]https://github.com/moby/go-archive/releases/tag/v0.3.0 · [email protected]https://github.com/moby/go-archive/security/advisories/GHSA-hfg8-hc9c-6c3h · [email protected]https://github.com/masasron/CopyEscape-CVE-2026-17106 · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

18 AUG 18:35Z
Tar extraction in moby/go-archive can write outside the destination directory via link following
cvelistv5