CVE-2026-75593
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk43th percentile - higher than 43% of all known CVEs
Summary
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.
Risk Assessment
An attacker with access to the BuildKit API could write files outside the state directory, potentially leading to system integrity compromise or privilege escalation.
Recommendation
Update BuildKit to version 0.31.2 or later, which includes the fix.
Original NVD description (English source)
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.