PT-2016-6647
CVE-2016-5699
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Published
2015-11-14
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Updated
2025-09-29
Description by
CVSS 3.1
6.1
MediumMetricsAV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Name of the Vulnerable Software and Affected Versions
Python versions prior to 2.7.10
Python versions 3.x prior to 3.4.4
Description
A CRLF injection issue exists in the HTTPConnection.putheader function in urllib2 and urllib, allowing remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL.
Recommendations
For versions prior to 2.7.10, update to version 2.7.10 or later.
For versions 3.x prior to 3.4.4, update to version 3.4.4 or later.
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