CVE-2026-15788

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:mobyproject:buildkit:*:*:*:*:*:*:*:*

History

24 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) El selector source= de montaje de caché de BuildKit en trabajadores de Contenedor de Windows (WCOW) no detecta uniones de directorio NTFS colocadas dentro de la raíz de la caché. Una compilación creada por un usuario no confiable en un demonio de BuildKit configurado para WCOW puede leer archivos arbitrarios del host accesibles para el proceso del demonio de BuildKit.

Information

Published : 2026-07-20 20:16

Updated : 2026-10-24 20:10

NVD link : CVE-2026-15788

Mitre link : CVE-2026-15788

CVE.ORG link : CVE-2026-15788

JSON object : View

Products Affected

mobyproject

buildkit

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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