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CVE-2026-75593— BuildKit: Malicious client can bypass destination directory validation on local sources upload

Quick assessment

Affected
moby buildkit
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Moby BuildKit是Moby团队开源的一款容器镜像构建引擎。 Moby BuildKit 0.31.2之前版本存在路径遍历漏洞，该漏洞源于路径遍历，可能导致文件逃逸出BuildKit控制的状态目录。

CVSS 7.2 · High EPSS 0.54% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
moby buildkit < 0.31.2 affected
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I. Basic Information for CVE-2026-75593

Vulnerability Information
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Vulnerability Title
BuildKit: Malicious client can bypass destination directory validation on local sources upload
Source: CVE Program / CVE List V5
Vulnerability Description
BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.2, a custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access BuildKit control API to issue builds, eg., bypass authentication, etc. This issue is fixed in version 0.31.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA: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
Moby BuildKit 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Moby BuildKit是Moby团队开源的一款容器镜像构建引擎。 Moby BuildKit 0.31.2之前版本存在路径遍历漏洞，该漏洞源于路径遍历，可能导致文件逃逸出BuildKit控制的状态目录。
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
moby buildkit < 0.31.2 -

II. Public POCs for CVE-2026-75593

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7703 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-75593

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Patches & Fixes for CVE-2026-75593 (1)

Vendor Advisories for CVE-2026-75593 (1)

Same Patch Batch · moby · 2026-08-19 · 3 CVEs total

CVE-2026-61711 5.3 MEDIUM BuildKit: Custom frontend could bypass Seccomp/AppArmor
CVE-2026-61712 2.3 LOW BuildKit: Possible runtime DoS via unbounded group parsing

IV. Related Vulnerabilities

Same product: buildkit
Same vendor: moby
Same weakness: CWE-22

V. Comments for CVE-2026-75593

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