CVE-2026-34054 PUBLISHED

openssl on Windows built with openssldir set from the build machine (Uncontrolled Search Path Element)

Assigner: GitHub_M
Reserved: 25.03.2026 Published: 31.03.2026 Updated: 31.03.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.8

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	microsoft
Product	vcpkg
Versions	Version < 3.6.1#3 is affected

References

https://github.com/microsoft/vcpkg/security/advisories/GHSA-p322-v6vw-vrq9
https://github.com/microsoft/vcpkg/pull/50518
https://github.com/microsoft/vcpkg/commit/5111afdf55cc1429d9951e4c7b02010e659346a9

Problem Types

CWE-427: Uncontrolled Search Path Element CWE