Input validation error in BuildKit - CVE-2026-33748

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Main Vulnerability Database Vulnerabilities #VU128395

Input validation error in BuildKit - CVE-2026-33748

Published: April 28, 2026


Vulnerability identifier: #VU128395
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33748
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
BuildKit
Software vendor:
Moby project

Description

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper input validation in Git URL fragment subdir handling when processing Git URLs with a subdir component. A remote attacker can supply a crafted Git URL subdir component to disclose sensitive information.

Possible access is limited to files on the same mounted filesystem.


Remediation

Install security update from vendor's website.

External links