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High severity7.5NVD Advisory· Published Mar 27, 2026· Updated Apr 20, 2026

CVE-2026-33748

CVE-2026-33748

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, insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository root. Possible access is limited to files on the same mounted filesystem. The issue has been fixed in version v0.28.1 The issue affects only builds that use Git URLs with a subpath component. As a workaround, avoid building Dockerfiles from untrusted sources or using the subdir component from an untrusted Git repository where the subdir component could point to a symlink.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/moby/buildkitGo
< 0.28.10.28.1

Affected products

62

Patches

Vulnerability mechanics

References

5

News mentions

0

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