CVE-2026-34054 json
openssl on Windows built with openssldir set from the build machine (Uncontrolled Search Path Element)
published 2026-03-31 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-17285
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- github.com/microsoft/vcpkg@5111afd commit
- github.com/microsoft/vcpkg#50518 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- microsoft vcpkg
Classification
- Weakness
-
- CWE-427 Uncontrolled Search Path Element
References
Sources
- CVE List CVE-2026-34054
- NVD CVE-2026-34054
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.