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Security Advisories

CVE-2026-33747

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-33747

Severity

8.4

High

CVSS V3

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Summary

BuildKit vulnerable to malicious frontend causing file escape outside of storage root

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, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with #syntax or --build-arg BUILDKIT_SYNTAX. Using these options with a well-known frontend image like docker/dockerfile is not affected.

References

Affected packages

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