BuildKit's cache mount source= selector on Windows Container on Windows (WCOW) workers does not detect NTFS directory junctions placed inside the cache root. A build authored by an untrusted user on …

High CVSS 7.5

CVECVE-2026-15788

First seen2026-08-06 03:15 UTC

Disclosed2026-07-20 20:16 UTC

Last updated2026-08-06 03:15 UTC

Channel statusauto

Summary

BuildKit's cache mount source= selector on Windows Container on Windows (WCOW) workers does not detect NTFS directory junctions placed inside the cache root. A build authored by an untrusted user on a WCOW-configured BuildKit daemon can read arbitrary host files reachable to the BuildKit daemon process.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

Sources

NVD DATABASE

Original Links

https://github.com/moby/buildkit/security/advisories/GHSA-388v-wmr2-g2v2 Vendor Advisory

Timeline

2026-08-06 nvd_ingest NVD