Vulnerability in Microsoft Vcpkg
CVE-2026-34054
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.
EPSS: 0.007 (50.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Vcpkg — versions < 3.6.1#3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-34054?
- CVE-2026-34054 is a high-severity vulnerability in Microsoft Vcpkg, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-03-31.
- How severe is CVE-2026-34054?
- High severity. CVSS v3 base score is 7.8 out of 10.