{"id":"USN-4570-1","summary":"python-urllib3 vulnerability","details":"It was discovered that urllib3 incorrectly handled certain character\nsequences. A remote attacker could possibly use this issue to perform CRLF\ninjection.\n","modified":"2026-02-10T04:41:56Z","published":"2020-10-05T17:04:30Z","related":["UBUNTU-CVE-2020-26137"],"upstream":["CVE-2020-26137","UBUNTU-CVE-2020-26137"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4570-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-26137"}],"affected":[{"package":{"name":"python-urllib3","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-urllib3@1.13.1-2ubuntu0.16.04.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.13.1-2ubuntu0.16.04.4"}]}],"versions":["1.11-1","1.12-1","1.13.1-1","1.13.1-2","1.13.1-2ubuntu0.16.04.1","1.13.1-2ubuntu0.16.04.2","1.13.1-2ubuntu0.16.04.3"],"ecosystem_specific":{"binaries":[{"binary_name":"python-urllib3","binary_version":"1.13.1-2ubuntu0.16.04.4"},{"binary_name":"python3-urllib3","binary_version":"1.13.1-2ubuntu0.16.04.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4570-1.json","cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"id":"CVE-2020-26137","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]}}},{"package":{"name":"python-urllib3","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/python-urllib3@1.22-1ubuntu0.18.04.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.22-1ubuntu0.18.04.2"}]}],"versions":["1.21.1-1","1.22-1","1.22-1ubuntu0.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-urllib3","binary_version":"1.22-1ubuntu0.18.04.2"},{"binary_name":"python3-urllib3","binary_version":"1.22-1ubuntu0.18.04.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4570-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"id":"CVE-2020-26137","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]}}},{"package":{"name":"python-urllib3","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/python-urllib3@1.25.8-2ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.25.8-2ubuntu0.1"}]}],"versions":["1.24.1-1ubuntu1","1.24.1-1ubuntu2","1.25.8-1","1.25.8-2"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-urllib3","binary_version":"1.25.8-2ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4570-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2020-26137","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]}}}],"schema_version":"1.7.3"}