---
cve: "CVE-2026-15788"
severity: "MEDIUM"
cvss: 5.6
epss: "0.3%"
vendor: "moby"
kev: false
exploited: false
published: "2026-07-20 19:12:56"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T01:13:56+02:00"
---

# CVE-2026-15788

> 5.6 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- e42e1bfd389af7203238cce77b1f7dad447285e9 (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-15788) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_