Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-33748— BuildKit Git URL subdir component can cause access to restricted files

Quick assessment

Affected
moby buildkit
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.

BuildKit是Moby开源的一个并发、高速缓存高效的构建器工具包。 BuildKit 0.28.1之前版本存在后置链接漏洞，该漏洞源于对Git URL片段子目录组件验证不足，可能导致访问已检出Git仓库根目录之外的文件。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.53% · P43
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-33748

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
BuildKit Git URL subdir component can cause access to restricted files
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 version 0.28.1, insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository root. Possible access is limited to files on the same mounted filesystem. The issue has been fixed in version v0.28.1 The issue affects only builds that use Git URLs with a subpath component. As a workaround, avoid building Dockerfiles from untrusted sources or using the subdir component from an untrusted Git repository where the subdir component could point to a symlink.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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
BuildKit 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BuildKit是Moby开源的一个并发、高速缓存高效的构建器工具包。 BuildKit 0.28.1之前版本存在后置链接漏洞，该漏洞源于对Git URL片段子目录组件验证不足，可能导致访问已检出Git仓库根目录之外的文件。
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 < 0.28.1 -

II. Public POCs for CVE-2026-33748

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-33748

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-33748 (1)

Vendor Advisories for CVE-2026-33748 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-33748

No comments yet

Leave a comment