Podman: buildah: buildah/copier: directory escape via crafted tar symlinks when used outside buildah by non-root callers
Priority LOW 21CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 1 fixed, 9 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00408 35th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 9 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | 6.1.3-1.hum1 | Patch available | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Hardened Images | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Dev Spaces | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Dev Spaces | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Dev Spaces | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Virtualization 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Quay 3 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Quay 3 | — | — | No fix listed | CNA |
- Red Hat Hardened Images VendorRed Hat Affected — Fixed in 6.1.3-1.hum1 Patch available CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Ansible Automation Platform 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Hardened Images VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 5 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Dev Spaces VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Dev Spaces VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Dev Spaces VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Virtualization 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Quay 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Quay 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:hummingbird:1 | 1 | — | Red Hat |
| cpe:/a:redhat:ansible_automation_platform:2 | 2 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:10 | 10 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8 | 8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9 | 9 | — | Red Hat |
| cpe:/a:redhat:openshift:4 | 4 | — | Red Hat |
| cpe:/a:redhat:openshift:5 | 5 | — | Red Hat |
| cpe:/a:redhat:openshift_devspaces:3 | 3 | — | Red Hat |
| cpe:/a:redhat:container_native_virtualization:4 | 4 | — | Red Hat |
| cpe:/a:redhat:quay:3 | 3 | — | Red Hat |
- cpe:/a:redhat:hummingbird:1 Versions 1 — ·Red Hat
- cpe:/a:redhat:ansible_automation_platform:2 Versions 2 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9 Versions 9 — ·Red Hat
- cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat
- cpe:/a:redhat:openshift:5 Versions 5 — ·Red Hat
- cpe:/a:redhat:openshift_devspaces:3 Versions 3 — ·Red Hat
- cpe:/a:redhat:container_native_virtualization:4 Versions 4 — ·Red Hat
- cpe:/a:redhat:quay:3 Versions 3 — ·Red Hat
Remediation
Red Hat 1 advisory
- RHSA-2026:74861 Released 2026-10-02 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images podman-6.1.3-1.hum1@aarch64, podman-6.1.3-1.hum1@src, podman-6.1.3-1.hum1@x86_64 +8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Red Hat Quay 3 | Affected | No fix yet: Fix deferred |
| Red Hat Hardened Images | Fixed | RHSA-2026:74861 |
Not affected: 1 product
- Red Hat Hardened Images
Timeline
- 2026-10-02 Threatist record created from CVE-2026-79705
- 2026-10-03 Alias added: GHSA-fmxx-r7q4-v8m6
- 2026-10-30 Affected versions changed · CNA
- 2026-10-30 Affected versions changed · Red Hat
References
More Red Hat vulnerabilities
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- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
- TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
- TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-79705 · CVE Program
- CVE-2026-79705 · NVD
- FIRST EPSS
- GHSA-fmxx-r7q4-v8m6 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-79705 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences