CVE-2026-44517
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
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 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.
Risk Assessment
The risk includes the possibility of including unauthorized files into the build context, which can lead to data leakage or injection of malicious code into the image. The attack requires supplying a malicious repository or archive.
Recommendation
It is recommended to update Buildah to version 1.43.2 or 1.44.0, which contain the fix. Also, avoid building images from untrusted sources.
Other vulnerabilities in Buildah
Original NVD description (English source)
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.