CVE-2016-4694: Apple Mac OS X
Critical severity, CVSS 9.1. EPSS: 1.3% chance of exploitation in the next 30 days.
The Apache HTTP Server in Apple OS X before 10.12 and OS X Server before 5.2 follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted CGI client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue, a related issue to CVE-2016-5387.
Affected products
Published 2016-09-25. Last modified 2026-06-17.