CVE-2026-93323: medium-severity vulnerability in moby BuildKit
Oversized Dockerfile or .dockerignore can exhaust buildkitd memory
Published
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.1%
exploitation probability
0.1%top 99% of all CVEs
observed exploitation
nono source reports it
The Dockerfile frontend loaded the Dockerfile and .dockerignore files of a build context into memory without a size limit. A build context containing an oversized file could make buildkitd allocate memory proportional to that file, potentially exhausting memory and terminating the daemon, which interrupts other builds on the same instance. Fixed by rejecting such files above 16 MiB.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
moby · BuildKitRelated CVEs — moby BuildKit
In the same product, most dangerous first.
CVE-2026-15788MEDIUMWCOW cache mount source selector resolves NTFS junctions outside of cache rootEPSS 0.4%CVE-2026-15789MEDIUMMalicious client can bypass destination directory validation on local sources uploadEPSS 0.3%CVE-2026-93326MEDIUMCrafted Git build source can bypass certain policy validationEPSS 0.2%CVE-2026-15791LOWLLB file operation can be tricked to remove /tmp directory contentsEPSS 0.2%CVE-2026-15792MEDIUMPossible panic when incorrect parameters sent from frontendEPSS 0.2%CVE-2026-93316HIGHStarting daemon with --cdi-disabled flag can lead to panic on specific buildsEPSS 0.2%