CVE-2026-93323

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

6.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS

0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)

CWE

CWE-789

Published

2026-10-05

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

References

• https://github.com/moby/buildkit/releases/tag/v0.33.1
• https://github.com/moby/buildkit/security/advisories/GHSA-mgqf-486f-49vp

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