CVE-2013-7440

5.9 mediumEPSS 1.9%

Medium (5.9) in python python. 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.

Severity

CVSS 3.0

5.9 medium

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 1.9% chance of exploitation in the next 30 days; higher than 79% of CVEs (scores of 2026-10-31)
CWE: CWE-19
Published: 2016-06-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

python:python

References

http://seclists.org/oss-sec/2015/q2/483
http://seclists.org/oss-sec/2015/q2/523
http://www.securityfocus.com/bid/74707
https://access.redhat.com/errata/RHSA-2016:1166
https://bugs.python.org/issue17997

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