MEDIUM 4.5 NVD

CVE-2026-121520

In BuildKit versions prior to v0.34.1, a malicious client with access to the BuildKit control APIs can submit a build request that sets an extended attribute on

In BuildKit versions prior to v0.34.1, a malicious client with access to the BuildKit control APIs can submit a build request that sets an extended attribute on a file outside the BuildKit state directory. Extended attributes in the trusted. or security. namespaces may also be set, potentially giving a program on the host elevated privileges. This issue affects build services that accept build requests from untrusted users. The issue is fixed in v0.34.1.

References

https://github.com/moby/buildkit/security/advisories/GHSA-w26x-xg27-7qjc

Published: 2026-11-03 · Source: NVD · Feed updated: 2026-11-04

This medium severity vulnerability with a CVSS score of 4.5 was published on 2026-11-03 via NVD.

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