CVE-2016-4467: Apache Qpid Proton

Medium severity, CVSS 5.9. EPSS: 1.6% chance of exploitation in the next 30 days.

The C client and C-based client bindings in the Apache Qpid Proton library before 0.13.1 on Windows do not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when using the SChannel-based security layer, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.

Affected products

• Apache Qpid Proton: version 0.8.0 only; version 0.9.0 only; version 0.9.1 only; version 0.10.0 only; version 0.11.0 only; version 0.11.1 only; …

Published 2017-05-02. Last modified 2026-06-17.