CVE-2026-79705
Podman: buildah: buildah/copier: directory escape via crafted tar symlinks when used outside buildah by non-root callers
At a glance
- Severity
- MEDIUM 4.5
- EPSS
- EPSS 0.41 % · percentile 35 (2026-10-28)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Awaiting Analysis
Description
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 4.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N | redhat |
| CVSS 3.1 | MEDIUM 4.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N | NVD · secalert@redhat.com (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2026-78823
- GCVE · GCVE-0-2026-79705
Affected products
References
- https://access.redhat.com/errata/RHSA-2026:74861
- https://access.redhat.com/security/cve/CVE-2026-79705
- https://bugzilla.redhat.com/show_bug.cgi?id=2523419
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |