CVE-2013-7440: Python

Medium severity, CVSS 5.9. EPSS: 1.9% chance of exploitation in the next 30 days.

The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate.

Affected products

• Python Python: up to and including 2.7.8; version 3.0 only; version 3.0.1 only; version 3.1 only; version 3.1.1 only; version 3.1.2 only; …

Published 2016-06-07. Last modified 2026-06-17.