Medium [CVE-2026-44517] Build breakout via malicious Git repository or tar archive
This medium-severity Red Hat Linux advisory covers CVE-2026-44517 affecting Red Hat Certification Program for Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10, Red Hat OpenShift Container Platform 4.
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Summary
Buildah is a tool that facilitates building OCI images. From 1.38.1 until 1.43.2 and 1.44.0, TempDirForURL in define/types.go does not securely confine Git repository subdirectories to the downloaded build context, and download ToDirectory and stdinToDirectory can follow a Dockerfile symlink left by a partially extracted tar archive.
A malicious server supplying a Git repository or tar archive can cause files outside the build context directory to be included in the context or copied into the build. This issue is fixed in versions 1.43.2 and 1.44.0.
A flaw was found in Buildah. This could lead to a build breakout, enabling an attacker to manipulate files on the host system.
Red Hat ships Buildah as a standalone package and as a bundled dependency in Podman across RHEL, OpenShift, and RHIVOS. Versions of Buildah from 1.38.1 through 1.43.1 are affected.
Red Hat severity: Moderate — CVSS 6.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N). Weakness: CWE-22.
Affected Red Hat products: Red Hat Certification Program for Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4; Red Hat OpenShift Dev Spaces; Red Hat OpenStack Platform 18.0; Red Hat Quay 3.
Red Hat lists Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Red Hat OpenShift Container Platform 4 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
- 1.43.2
- 1.44.0
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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