CVE-2026-93323

Description

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.

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Weakness Type (CWE)

CWE-789 CWE-789

References

Other References

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

Frequently Asked Questions

What is 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.

How do I check if I'm vulnerable to CVE-2026-93323? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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