CVE-2026-75593

Aliases:RHSA-2026:50953
Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2026-71556
Deferred
Published: 19 Aug 2026, 20:06
Last modified:25 Aug 2026, 14:02

Vulnerability Summary

Overall Risk (default)
medium
29/100
CVSS Score
7.2 HIGH
v4.0 (cve.org)
EPSS Score
0.54% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Aug 2026, 20:06
Published
Vulnerability first disclosed
25 Aug 2026, 14:02
Last Modified
Vulnerability information updated

Description

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.2, a custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access BuildKit control API to issue builds, eg., bypass authentication, etc. This issue is fixed in version 0.31.2.

CVSS Metrics

  • v4.0•HIGH•Score: 7.2CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
  • v4.0•HIGH•Score: 7.2CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/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
  • v3.1•HIGH•Score: 7.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

EPSS Trends

Current EPSS score: 0.54%• Percentile: 44%

Techniques & Countermeasures

  • CWE-22•Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

    The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Affected Systems

  • moby•buildkit

    < 0.31.2

  • redhat•trivy

    < 0:0.73.0-0.1.hum1

References (19)