CVE-2026-17106: Tar extraction in moby/go-archive can write outside the destination directory via link following

unknownpublic exploitCVE-2026-17106

CSIRTS triage

vendor: moby product: go-archive Path traversal

What: Tar extraction in go-archive follows symlinks and can write files outside the destination directory.
Who is affected: Container runtimes and build systems using moby/go-archive for tar operations.
Urgency: Unknown severity; path traversal during archive extraction can lead to arbitrary file write.
Action: Update moby/go-archive to a version with symlink validation or implement sandboxed extraction.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-17106

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-171060.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-17106	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] docker: Vulnerability allows manipulation of filescert-bund
highGHSA-hfg8-hc9c-6c3h: moby/go-archive: Crafted tar archive can write outside the extraction directoryghsa
unknownCVE-2026-17106: The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, …nvd
unknownDocker Desktop Security Restriction Bypass Vulnerabilityhkcert
unknownVulnerability in Docker (August 11, 2026)cert-fr-avis

Recent advisories for Tar extraction in

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-71364: A path traversal vulnerability was found in AWX's project archive extraction. The project_arch…nvd · 2026-08-24
unknownCVE-2026-19672: The tarfile module's tar and data extraction filters created directories outside the destinati…nvd · 2026-08-19
highGHSA-hfg8-hc9c-6c3h: moby/go-archive: Crafted tar archive can write outside the extraction directoryghsa · 2026-08-18
unknownCVE-2026-17106: The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, …nvd · 2026-08-18
unknownCVE-2026-74764: Pandora contains a path traversal vulnerability in its TAR archive extraction functionality. W…nvd · 2026-08-15
unknownCVE-2026-66484: GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. …nvd · 2026-08-10