High 7.8Published Mar 30, 2026

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

Updated under an hour ago (Oct 27, 2026, 10:00 AM ET)

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It affects microsoft vcpkg. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for microsoft vcpkg

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-427
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Apr 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

microsoft vcpkg microsoft:vcpkg (from the name)	before 3.6.1#3	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.