UBUNTU-CVE-2026-33748

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2026-33748
Downstream
USN-8230-1
Published: 22 Apr 2026, 00:00
Last modified:20 May 2026, 16:25

Vulnerability Summary

Overall Risk (default)
medium
33/100
CVSS Score
8.2 HIGH
4.0 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Apr 2026, 00:00
Published
Vulnerability first disclosed
20 May 2026, 16:25
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 version 0.28.1, insufficient validation of Git URL fragment subdir components may allow access to files outside the checked-out Git repository root. Possible access is limited to files on the same mounted filesystem. The issue has been fixed in version v0.28.1 The issue affects only builds that use Git URLs with a subpath component. As a workaround, avoid building Dockerfiles from untrusted sources or using the subdir component from an untrusted Git repository where the subdir component could point to a symlink.

CVSS Metrics

  • v4.0•HIGH•Score: 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Systems

  • ubuntu•docker.io

    all | all | all

  • ubuntu•docker.io-app

    all | all | < 26.1.3-0ubuntu1~20.04.1+esm2 | < 29.1.3-0ubuntu3~22.04.2 | < 29.1.3-0ubuntu3~24.04.2 | all | < 29.1.3-0ubuntu4.1

References (6)