PT-2026-29186 · Openssl+1 · Openssl+1

Xavier Danest · Published 2026-03-31 · Updated 2026-04-15 · CVE-2026-34054

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions vcpkg versions prior to 3.6.1#3

Description vcpkg, a C/C++ package manager, exhibited a configuration issue in its Windows builds of OpenSSL. Specifically, the openssldir setting was configured to a path on the build machine. This configuration could potentially allow for attacks on customer machines. The issue was addressed with version 3.6.1#3.

Recommendations Update to vcpkg version 3.6.1#3 or later.

Fix

LPE

Uncontrolled Search Path Element

Weakness Enumeration

CWE-427

Related Identifiers

CVE-2026-34054

ZDI-26-281

Affected Products

Openssl

Vcpkg

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-34054 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-26-281 · Security Note
• https://github.com/microsoft/vcpkg/commit/5111afdf55cc1429d9951e4c7b02010e659346a9 · Note
• https://github.com/microsoft/vcpkg/security/advisories/GHSA-p322-v6vw-vrq9 · Note
• https://github.com/microsoft/vcpkg/pull/50518 · Note
• https://twitter.com/0dayPublishing/status/2038804566620221850 · Twitter Post
• https://twitter.com/CVEnew/status/2038916038885343564 · Twitter Post
• https://twitter.com/ptdbugs/status/2038871912252674158 · Twitter Post
• https://twitter.com/CVEarity/status/2038953704246943764 · Twitter Post