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CVE-2026-44517— Buildah: Build breakout using malicious Containerfile and Git Smart HTTP server or GitHub release tar archive

Quick assessment

Affected
containers buildah
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

podman-container-tools Buildah是podman-container-tools组织的一款容器镜像构建工具。 podman-container-tools Buildah 1.38.1版本至1.43.2之前版本存在路径遍历漏洞，该漏洞源于define/types.go中的TempDirForURL未能将Git仓库子目录安全限制在下载的构建上下文中，且downloadToDirectory和stdinToDirectory可能遵循部分提取的tar归档留下的Dockerfile符号链

CVSS 6.3 · Medium EPSS 0.18% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
containers buildah >= 1.38.1, < 1.43.2 affected
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I. Basic Information for CVE-2026-44517

Vulnerability Information
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Vulnerability Title
Buildah: Build breakout using malicious Containerfile and Git Smart HTTP server or GitHub release tar archive
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
podman-container-tools Buildah 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
podman-container-tools Buildah是podman-container-tools组织的一款容器镜像构建工具。 podman-container-tools Buildah 1.38.1版本至1.43.2之前版本存在路径遍历漏洞，该漏洞源于define/types.go中的TempDirForURL未能将Git仓库子目录安全限制在下载的构建上下文中，且downloadToDirectory和stdinToDirectory可能遵循部分提取的tar归档留下的Dockerfile符号链
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
containers buildah >= 1.38.1, < 1.43.2 -

II. Public POCs for CVE-2026-44517

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III. Intelligence Information for CVE-2026-44517

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Patches & Fixes for CVE-2026-44517 (2)

Vendor Advisories for CVE-2026-44517 (1)

Vendor Pages for CVE-2026-44517 (1)

Other References for CVE-2026-44517 (1)

IV. Related Vulnerabilities

Same product: buildah
Same vendor: containers
Same weakness: CWE-22

V. Comments for CVE-2026-44517

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