Buildah: Build breakout using malicious Containerfile and Git Smart HTTP server or GitHub release tar archive

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-44517
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-21 21:16:59 UTC
Updated2026-08-21 21:16:59 UTC
DescriptionBuildah 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.

Risk And Classification

Primary CVSS: v3.1 6.3 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS: 0.001800000 probability, percentile 0.078100000 (date 2026-08-22)

Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.3MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
3.1CNADECLARED6.3MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Containers Buildah affected >= 1.38.1, < 1.43.2 Not specified

References

ReferenceSourceLinkTags
github.com/podman-container-tools/buildah/releases/tag/v1.44.0 [email protected] github.com
github.com/podman-container-tools/buildah/commit/fc2003bb2efeb3ed7d5c7e1... [email protected] github.com
github.com/podman-container-tools/buildah/security/advisories/GHSA-49p4-... [email protected] github.com
github.com/podman-container-tools/buildah/commit/54459cf8a0feb4b1da766e4... [email protected] github.com
github.com/podman-container-tools/buildah/releases/tag/v1.43.2 [email protected] github.com
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