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Servers and applications

CVE-2014-4650

The CGIHTTPServer module in Python 2.7.5 and 3.3.4 does not properly handle URLs in which URL encoding is used for path separators, which allows remote attackers to read script source code or conduct directory traversal attacks and execute unintended code via a crafted character sequence, as demonstrated by a %2f separator.

Severity
Critical 9.8
Published
20 Feb 2020
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
2.7.8, 3.2.6, 3.3.6, 3.4.2
Sources
NVD

Affected software

SoftwareAffected versions
PythonServers and applications · cpe:a:python:python
  • From 2.7.0 before 2.7.8
  • From 3.2.0 before 3.2.6
  • From 3.3.0 before 3.3.6
  • From 3.4.0 before 3.4.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2014-4650
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2014-4650