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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/moby/buildkitGo | < 0.28.1 | 0.28.1 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/advisories/GHSA-4vrq-3vrq-g6ggghsaADVISORY
- github.com/moby/buildkit/security/advisories/GHSA-4vrq-3vrq-g6ggnvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-33748ghsaADVISORY
- docs.docker.com/build/concepts/context/nvdProductWEB
- github.com/moby/buildkit/releases/tag/v0.28.1nvdProductRelease NotesWEB
News mentions
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