Vulnerability Database

300,444

Total vulnerabilities in the database

CVE-2016-5699

CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython (aka Python) before 2.7.10 and 3.x before 3.4.4 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL.

  • Published: Sep 2, 2016
  • Updated: Nov 9, 2025
  • CVE: CVE-2016-5699
  • Severity: Low
  • Exploit:

CVSS v2:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:M/Au:N/C:N/I:P/A:N

CWEs:

Software From Fixed in
python / python - 2.7.9.x
python / python 3.1.1 3.1.1.x
python / python 3.3.2 3.3.2.x
python / python 3.0 3.0.x
python / python 3.0.1 3.0.1.x
python / python 3.2.2 3.2.2.x
python / python 3.1.0 3.1.0.x
python / python 3.2.5 3.2.5.x
python / python 3.1.5 3.1.5.x
python / python 3.3.6 3.3.6.x
python / python 3.4.0 3.4.0.x
python / python 3.2.1 3.2.1.x
python / python 3.2.0 3.2.0.x
python / python 3.3.1 3.3.1.x
python / python 3.4.3 3.4.3.x
python / python 3.1.2 3.1.2.x
python / python 3.3.4 3.3.4.x
python / python 3.3.5 3.3.5.x
python / python 3.2.3 3.2.3.x
python / python 3.2.6 3.2.6.x
python / python 3.3.0 3.3.0.x
python / python 3.4.2 3.4.2.x
python / python 3.3.3 3.3.3.x
python / python 3.2.4 3.2.4.x
python / python 3.4.1 3.4.1.x
python / python 3.1.3 3.1.3.x
python / python 3.1.4 3.1.4.x