Symlink Attack Affecting github.com/moby/go-archive package, versions <0.3.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 Aug 2026
- disclosed18 Aug 2026
- creditUnknown
Introduced: 18 Aug 2026
NewCVE-2026-17106 (opens in a new tab)How to fix?
Upgrade github.com/moby/go-archive to version 0.3.0 or higher.
Overview
Affected versions of this package are vulnerable to Symlink Attack through the Unpack and UnpackLayer routines in archive.go and diff.go. An attacker can create or overwrite files outside the intended extraction directory by supplying a crafted archive with traversal entries or symlink chains during extraction. The vulnerable code relies on lexical path checks while resolving archive entries on filesystem paths the OS can follow, so extracted content can escape the destination root and affect arbitrary writable files on the host.