CVE-2013-7440

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2022-05-17. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 2%CVSS: 5.9Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
5.9
EG Score
5.9(medium)
EPSS
77.2%
KEV
Not listed

Published

June 7, 2016

Last Modified

May 6, 2026

References (14)

Vendor Advisories for CVE-2013-7440(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpython27-scipy-0:0.12.1-4.el72016-05-31redhat
redhatpython-httplib2-0:0.6.0-6.el7sat2014-09-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Data Freshness Timeline

(refreshed 11× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-22 21:53 UTCEG score recompute
  2. 2026-07-22 14:04 UTCEPSS rescore
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  71. 2026-05-22 20:06 UTCVendor advisory
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Frequently asked(5)

What is CVE-2013-7440?
CVE-2013-7440 is a medium vulnerability published on June 7, 2016. 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.
When was CVE-2013-7440 disclosed?
CVE-2013-7440 was first published in the National Vulnerability Database on June 7, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-7440 actively exploited?
CVE-2013-7440 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2013-7440?
CVE-2013-7440 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2013-7440?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-7440, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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