VULNERABILITY INTELLIGENCE
CVE-2026-17106
CVSS score7.1 HIGH
EPSS probability0.44%
CISA KEVNot currently listed
Published2026-08-18
Last modified2026-08-28
CVSS vectorCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Description
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.
Weakness classification
- CWE-59: Improper Link Resolution Before File Access ('Link Following')