CVE-2026-15789— Malicious client can bypass destination directory validation on local sources upload
Possible ATT&CK Techniques 3AI
T1068 · Exploitation for Privilege Escalation T1218 · System Binary Proxy Execution T1059 · Command and Scripting InterpreterGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-15789
Vulnerability Information
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Vulnerability Title
Malicious client can bypass destination directory validation on local sources upload
Source: CVE Program / CVE List V5
Vulnerability Description
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 the BuildKit control API to issue builds, e.g., bypass authentication, etc.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/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团队开源的一个并发、高速缓存高效的构建器工具包。 Moby BuildKit 0.31.2之前版本存在路径遍历漏洞，该漏洞源于上传请求导致文件逃逸出BuildKit控制的状态目录，可能允许具有有效权限的客户端绕过身份验证并访问BuildKit控制API。
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
II. Public POCs for CVE-2026-15789
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-15789 (1)
Same Patch Batch · moby · 2026-07-21 · 4 CVEs total
| CVE-2026-15792 | Possible panic when incorrect parameters sent from frontend | |
| CVE-2026-15793 | Git source checkout from a bundle file could lead to command injection | |
| CVE-2026-15791 | LLB file operation can be tricked to remove /tmp directory contents |
IV. Related Vulnerabilities
Same product: BuildKit
- CVE-2026-15793
Git source checkout from a bundle file could lead to command - CVE-2026-15792
Possible panic when incorrect parameters sent from frontend - CVE-2026-15791
LLB file operation can be tricked to remove /tmp directory c - CVE-2026-15788
WCOW cache mount source selector resolves NTFS junctions out - CVE-2026-33748
BuildKit Git URL subdir component can cause access to restri
Same vendor: moby
- CVE-2026-15793
Git source checkout from a bundle file could lead to command - CVE-2026-15791
LLB file operation can be tricked to remove /tmp directory c - CVE-2026-15792
Possible panic when incorrect parameters sent from frontend - CVE-2026-15788
WCOW cache mount source selector resolves NTFS junctions out - CVE-2026-42306
Moby: Race condition in docker cp allows bind mount redirect
Same weakness: CWE-22
- CVE-2026-17604
Kirki <= 6.1.1 - Authenticated (Editor+) Path Traversal to A - CVE-2026-15056
StoreEngine <= 2.1.1 - Authenticated (Vendor+) Arbitrary Fil - CVE-2026-14524
ProSolution WP Client <= 2.0.8 - Unauthenticated Arbitrary F - CVE-2026-74764
Path Traversal in TAR Archive Extraction Allows Arbitrary Fi - CVE-2026-18855
Link Library <= 7.9.4 - Unauthenticated Arbitrary File Delet
V. Comments for CVE-2026-15789
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