CVE-2026-93320

BuildKit improperly handles special files in build snapshots

State: Published
Severity: 6.0 Medium
Published: Oct 5, 2026
Updated: Oct 5, 2026
Reserved: Sep 17, 2026

Description

BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.

Scores

CVSS	Score	Vector	Source
4.0	6.0 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H	Docker

Weaknesses

CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')

Affected Products

Product	Versions
BuildKitmoby	0.33.0 and earlierAffected

References

https://github.com/moby/buildkit/security/advisories/GHSA-9728-qjrv-2xh2vendor-advisory
https://github.com/moby/buildkit/releases/tag/v0.33.1patch

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