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HIGH

BuildKit Git URL subdir component can cause access to restricted files

Published Mar 27, 2026

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.

Affected products

Remediation

Red Hat mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Weaknesses (2)

CWE-22

Path Traversal

CWE-59

References (9)

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED
Assigner GitHub_M
Published Mar 27, 2026
Updated Mar 27, 2026
Reserved Mar 23, 2026
Link CVE-2026-33748

CISA Vulnrichment

Updated Mar 27, 2026

NVD

Status Analyzed
Modified Jun 17, 2026
Link CVE-2026-33748

Red Hat

Severity Moderate
Public date Mar 27, 2026
Bugzilla 2452271
Link CVE-2026-33748

ENISA EUVD

Assigner GitHub_M
Published Mar 27, 2026
Updated Mar 27, 2026
Link EUVD-2026-16618

GitHub

Link GHSA-4VRQ-3VRQ-G6GG