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.
https://bugs.python.org/issue39603
https://github.com/urllib3/urllib3/commit/1dd69c5c5982fae7c87a620d487c2ebf7a6b436b
https://github.com/urllib3/urllib3/pull/1800
https://usn.ubuntu.com/4570-1/
https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
Source: MITRE
Published: 2020-09-30
Updated: 2023-01-31
Type: CWE-74
Base Score: 6.4
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N
Impact Score: 4.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Impact Score: 2.5
Exploitability Score: 3.9
Severity: MEDIUM