In the urllib3 library through 1.24.1 for Python, CRLF injection is possible if the attacker controls the request parameter.
https://usn.ubuntu.com/3990-2/
https://usn.ubuntu.com/3990-1/
https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
https://lists.debian.org/debian-lts-announce/2019/06/msg00016.html
https://github.com/urllib3/urllib3/issues/1553
https://access.redhat.com/errata/RHSA-2019:3590
https://access.redhat.com/errata/RHSA-2019:3335
https://access.redhat.com/errata/RHSA-2019:2272
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html