Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M
CVE-2026-44517Buildah: Build breakout using malicious Containerfile and Git Smart HTTP server or GitHub release tar archive
Medium 6.3
In plain English
A medium-severity path traversal in buildah from containers. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 downloadToDirectory 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | podman | 5.8.3-r0 | ALPINE-CVE-2026-44517 |
| Debian:13 | golang-github-containers-buildah | no fix listed | DEBIAN-CVE-2026-44517 |
| Debian:14 | golang-github-containers-buildah | 1.43.2+ds1-1 | DEBIAN-CVE-2026-44517 |
| Go | github.com/containers/buildah | no fix listed | GO-2026-5116 |
| Go | github.com/containers/buildah | 1.43.2 | GHSA-49p4-px3h-rq49 |
| Ubuntu:22.04:LTS | golang-github-containers-buildah | no fix listed | UBUNTU-CVE-2026-44517 |
| Ubuntu:25.10 | golang-github-containers-buildah | no fix listed | UBUNTU-CVE-2026-44517 |
| Ubuntu:26.10 | golang-github-containers-buildah | no fix listed | UBUNTU-CVE-2026-44517 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| containers | buildah | >= 1.38.1, < 1.43.2 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
References
- https://github.com/podman-container-tools/buildah/security/advisories/GHSA-49p4-px3h-rq49 x_refsource_CONFIRM
- https://github.com/podman-container-tools/buildah/commit/54459cf8a0feb4b1da766e4a6360451834e1846c x_refsource_MISC
- https://github.com/podman-container-tools/buildah/commit/fc2003bb2efeb3ed7d5c7e1e88d04e78f370a944 x_refsource_MISC
- https://github.com/podman-container-tools/buildah/releases/tag/v1.43.2 x_refsource_MISC
- https://github.com/podman-container-tools/buildah/releases/tag/v1.44.0 x_refsource_MISC