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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
| Red Hat | Red Hat OpenShift Dev Spaces | — | — |
| Red Hat | Red Hat OpenShift Virtualization 4 | — | — |
| Red Hat | Red Hat Quay 3 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | golang-github-containers-buildah | No fix yet | — |
| Debian 13 | golang-github-containers-buildah | No fix yet | — |
| Debian 12 | golang-github-containers-buildah | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | golang-github-containers-buildah | No fix yet | — |
| Ubuntu 22.04 LTS | golang-github-containers-buildah | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | golang-github-containers-buildah | No fix yet | — |
| Ubuntu Pro 24.04 LTS | golang-github-containers-buildah | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | podman +4 | 6.1.3-1.hum1 | RHSA-2026:74861 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | podman | 5.8.8-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | podman +2 | No fix yet | — |
Advisories 1
- RHSA-2026:74861 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
References
- RHSA-2026:74861 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-79705 vdb-entry
- RHBZ#2523419 issue-tracking