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CVE-2026-33747 PUBLISHED CVSS 8.399999618530273 HIGH

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.

EPSS 0.01% · 0.4th percentile

Risk Scores

CVSS v3.1
8.399999618530273
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.01%
0.4th percentile

Affected Products

VendorProductVersions
github.commoby/buildkit0, 0, 0
mobyprojectbuildkit0
mobybuildkit< 0.28.1, < 0.28.1, < 0.28.1

Timeline

References

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