CVE-2026-93322

Malformed MergeOp can crash the BuildKit daemon

Published Oct 5, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
A malicious frontend can submit an LLB definition that causes buildkitd
to panic and terminate, interrupting all builds running on that daemon.

Remediation

Vendor Workaround

Avoid using external BuildKit frontends from untrusted sources. Dockerfile builds are unaffected.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-248
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Type Values Removed Values Added
First Time appeared Moby
Moby buildkit
Vendors & Products Moby
Moby buildkit
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A malicious frontend can submit an LLB definition that causes buildkitd to panic and terminate, interrupting all builds running on that daemon.
Title Malformed MergeOp can crash the BuildKit daemon
Weaknesses CWE-129
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Docker
Published
Updated
Oct 5, 2026, 6:51 PM
Reserved
Sep 17, 2026, 5:18 PM
Status
Awaiting Analysis
Published
Oct 5, 2026, 6:17 PM
Modified
Oct 6, 2026, 3:08 PM
Severity
Moderate
Public date
Oct 5, 2026, 5:53 PM