CVE-2016-6286: Call-Cc HTTP-Client

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

The "spiffy-cgi-handlers" egg would convert a nonexistent "Proxy" header to the HTTP_PROXY environment variable, which would allow attackers to direct CGI programs which use this environment variable to use an attacker-specified HTTP proxy server (also known as a "httpoxy" attack). This affects all versions of spiffy-cgi-handlers before 0.5.

Affected products

• Call-Cc HTTP-Client: up to and including 0.4.2

Published 2017-01-10. Last modified 2026-06-17.