CVE-2026-15788
WCOW cache mount source selector resolves NTFS junctions outside of cache root
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-59 |
| Vendor | moby |
| Product | buildkit |
| Published | Jul 20, 2026 |
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Affected Versions
moby / BuildKit
0 < 0.31.2
References
Credits
Junyi Liu (mosskappa)