CVE-2013-7440

5.9 MEDIUM 2% exploit odds No fix listed

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data tampering.
Exploit odds: 1.9% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2016-06-07 18:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 00:01 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.9% in the next 30 days (EPSS).
Severity: 5.9 MEDIUM (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2016-06-07 18:59 UTC
Last modified: 2026-06-17 00:01 UTC
Exploit probability: 1.9% · EPSS, next 30 days
Weakness: CWE-19
Record status: Modified

Affected

Python ≤ 2.7.8
Python 3.0
Python 3.0.1
Python 3.1
Python 3.1.1
Python 3.1.2
Python 3.1.3
Python 3.1.4

Attack profile CVSS 3.0 · 5.9

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2013-7440.md and follow it. Check whether this project is affected by CVE-2013-7440. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record