# CVE-2026-79705: Podman: buildah: buildah/copier: directory escape via crafted tar symlinks when used outside buildah by non-root callers

Status: published. Published: 2026-09-15. Updated: 2026-11-06.

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.

## Remediation

- workaround: To mitigate this issue, users should ensure that `podman cp` operations are only performed against trusted Podman system service servers. Copying content from untrusted sources may expose the client to directory traversal vulnerabilities. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Hardened Images (podman-main): ≥ 6.1.3-1.hum1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (ansible-automation-platform-24/eda-controller-rhel8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (ansible-automation-platform-25/eda-controller-rhel8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (ansible-automation-platform-26/eda-controller-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (ansible-automation-platform-27/eda-controller-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (python3.11-podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (python3.12-podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (python3x-podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Ansible Automation Platform 2 (python-podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (python-podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (rhel10/buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (ubi10/buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (ubi10/podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (container-tools:rhel8/buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (container-tools:rhel8/podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (ubi8/buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (ubi8/podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (python-podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (ubi9/buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (ubi9/podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (buildah): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (podman): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 5 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Dev Spaces (devspaces/udi-base-rhel10): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Dev Spaces (devspaces/udi-base-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Dev Spaces (devspaces/udi-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Virtualization 4 (container-native-virtualization/ocp-virt-validation-checkup-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Quay 3 (quay/quay-builder-rhel8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Quay 3 (quay/quay-builder-rhel9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 4.5 (medium); CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.41% as of 2026-11-05; percentile 35.25%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2026:74861 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-79705 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2523419 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-79705; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-79705; retrieved 2026-11-06; source updated Not reported

Revision: 5656b8f5a40a965d34e423a7dcbc3a08cfdefcc0d916acaf5ed243794b34bc59

Canonical: https://y2.dev/cve/CVE-2026-79705

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