Dashboard / CVE-2026-15788

CVE-2026-15788

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 36/100
Published: 2026-07-20 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth Conf. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Active
S: X
AT: Present
VC: High
VI: None
VA: None

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
mobyproject buildkit < 0.31.2

References & Advisories (1)

Bug Bounty Relevance

36 / 100
✓ No authentication
✓ Low complexity

CVSS Score

5.6 / 10.0 v4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.41%
Raw Score 0.004110
Percentile 35.3%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00411
2026-10-28
0.00411

Intelligence Sources

nvd ref →

External Links