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.
Buildah 是一款用于构建 OCI（开放容器倡议）镜像的工具。在版本 1.38.1 至 1.43.2（含）以及 1.44.0 中， 文件中的 函数未能将 Git 仓库的子目录安全地限制在下载构建上下文范围内；此外， 和 函数可能跟随由部分解压的 tar 归档文件遗留的 Dockerfile 符号链接（symlink）。恶意服务器通过提供恶意的 Git 仓库或 tar 归档文件，可导致构建上下文目录外的文件被包含在构建上下文中，或被复制到构建过程中。该问题已在版本 1.43.2 和 1.44.0 中得到修复。
Possible ATT&CK Techniques 3 AI
T1053 · Scheduled Task/Job T1059 · Command and Scripting Interpreter T1027 · Obfuscated Files or InformationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| containers | buildah | >= 1.38.1, < 1.43.2 | - |
|
II. Public POCs for CVE-2026-44517
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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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)
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🔗 Release v1.44.0 · podman-container-tools/buildah · GitHub x_refsource_MISC
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