4.5 Medium

A flaw was found in the buildah/copier Go package.

CVE-2026-79705

A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not affected.

Assessment

CVSS: 4.5 (v3.1)
Severity: Medium
EPSS: 0.41% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 15 September 2026
Last updated: 1 November 2026
Affected: Red Hat
Assigner: redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N

At the source

EUVD (ENISA)

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