Medium severity · published Oct 5, 2026
CVE-2026-93321
Malformed LLB file operation can crash buildkitd
6.9
CVSS
0.2%
EPSS
No
On KEV
Description
A malicious frontend can submit an LLB definition that causes buildkitd
to panic and terminate, interrupting all builds running on that daemon.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BU
BuildKit · moby
through 0.33.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93321
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93321
vendor-advisory
https://github.com/moby/buildkit/security/advisories/GHSA-fjj4-h6vf-m9hj
patch
https://github.com/moby/buildkit/releases/tag/v0.33.1
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