PT-2026-61699 · Buildkit · Buildkit

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CVE-2026-15788

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Published

2026-07-20

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Updated

2026-08-05

CVSS v3.1

7.5

High

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Name of the Vulnerable Software and Affected Versions BuildKit (affected versions not specified)
Description On Windows Container on Windows (WCOW) workers, the cache mount source= selector fails to detect NTFS directory junctions located within the cache root. This allows an untrusted user to author a build that can read arbitrary host files accessible to the BuildKit daemon process.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Link Following

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Weakness Enumeration

Related Identifiers

CVE-2026-15788
GHSA-388V-WMR2-G2V2
RHSA-2026:43122
RHSA-2026:44152
RHSA-2026:46988
RHSA-2026:51065

Affected Products

Buildkit