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Vulnerability IntelligenceCVE-2026-15789

CVE-2026-15789

HIGH7.5

Malicious client can bypass destination directory validation on local sources upload

Published Jul 21, 2026

Modified 2 months ago

Details

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.

References

https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976

https://www.cve.org/CVERecord?id=CVE-2026-15789

CVSS Analysis

CVSS v4.0

6.9

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

HighVI:H

Vuln. Availability

HighVA:H

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

6.9/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

Weakness Type (CWE)

Input Validation

Ecosystems

Timeline

PublishedJul 21, 2026

ModifiedJul 21, 2026

CVE-2026-15789 | Mondoo Vulnerability Intelligence