{"id":"UBUNTU-CVE-2020-26137","details":"urllib3 before 1.25.9 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of putrequest(). NOTE: this is similar to CVE-2020-26116.","modified":"2026-01-30T02:01:01.994982Z","published":"2020-09-30T00:00:00Z","related":["USN-4570-1"],"upstream":["CVE-2020-26137"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-26137"},{"type":"REPORT","url":"https://github.com/urllib3/urllib3/pull/1800"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4570-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-26137"}],"affected":[{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/python-pip@1.5.4-1ubuntu4+esm5?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-2","1.5.4-1","1.5.4-1ubuntu1","1.5.4-1ubuntu3","1.5.4-1ubuntu4","1.5.4-1ubuntu4+esm1","1.5.4-1ubuntu4+esm2","1.5.4-1ubuntu4+esm3","1.5.4-1ubuntu4+esm4","1.5.4-1ubuntu4+esm5"],"ecosystem_specific":{"binaries":[{"binary_name":"python-pip","binary_version":"1.5.4-1ubuntu4+esm5"},{"binary_version":"1.5.4-1ubuntu4+esm5","binary_name":"python-pip-whl"},{"binary_version":"1.5.4-1ubuntu4+esm5","binary_name":"python3-pip"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26137.json"}},{"package":{"name":"python-urllib3","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/python-urllib3@1.7.1-1ubuntu4.1+esm1?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6-2","1.7.1-1","1.7.1-1build1","1.7.1-1ubuntu0.1","1.7.1-1ubuntu3","1.7.1-1ubuntu4","1.7.1-1ubuntu4.1","1.7.1-1ubuntu4.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-urllib3","binary_version":"1.7.1-1ubuntu4.1+esm1"},{"binary_name":"python-urllib3-whl","binary_version":"1.7.1-1ubuntu4.1+esm1"},{"binary_name":"python3-urllib3","binary_version":"1.7.1-1ubuntu4.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26137.json"}},{"package":{"name":"python-pip","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-pip@8.1.1-2ubuntu0.6?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.1.1-2ubuntu0.6"}]}],"versions":["1.5.6-7ubuntu1","1.5.6-7ubuntu2","8.0.2-7","8.0.3-1","8.0.3-2","8.1.0-1","8.1.0-2","8.1.1-1","8.1.1-2","8.1.1-2ubuntu0.1","8.1.1-2ubuntu0.2","8.1.1-2ubuntu0.4"],"ecosystem_specific":{"availability":"No 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