gunicorn version 19.4.5 contains a CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers vulnerability in “process_headers” function in “gunicorn/http/wsgi.py” that can result in an attacker causing the server to return arbitrary HTTP headers. This vulnerability appears to have been fixed in 19.5.0.
epadillas.github.io/2018/04/02/http-header-splitting-in-gunicorn-19.4.5
github.com/advisories/GHSA-32pc-xphx-q4f6
github.com/benoitc/gunicorn
github.com/benoitc/gunicorn/issues/1227
lists.debian.org/debian-lts-announce/2018/04/msg00022.html
nvd.nist.gov/vuln/detail/CVE-2018-1000164
usn.ubuntu.com/4022-1
www.debian.org/security/2018/dsa-4186