Vulnerability in moby BuildKit

[ Description ]Official description

A build step for a Git source, crafted in a specific way, can bypass some policy validation rules. A malicious build definition can make the repository look like it is coming from a different remote URL than it really is when Git clone is happening. If policy is doing more stricter validation, for example based on commit SHA, commit data, or signatures, then all these validations still apply correctly.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3741

  BuildKit: Multiple vulnerabilities Translated from German

  CVE-2026-93319CVE-2026-93318CVE-2026-93323+7 more CVEs

[ References ]References

• github.com/moby/buildkit/releases/tag/v0.33.1
• github.com/moby/buildkit/security/advisories/GHSA-66hf-6vf5-87hc