CVE-2026-34054 HIGH

CVE-2026-34054: openssl on Windows built with openssldir set from the build machine (Uncontrolled Search Path Element)

Vendor Microsoft
Product vcpkg
Weakness CWE-427
Published March 31, 2026
Last update April 2, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

vcpkg is a free and open-source C/C++ package manager. Prior to version 3.6.1#3, vcpkg's Windows builds of OpenSSL set openssldir to a path on the build machine, making that path be attackable later on customer machines. This issue has been patched in version 3.6.1#3.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
April 2, 2026 Record updated