CVE-2018-1000164

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.

• CWE-93

• https://epadillas.github.io/2018/04/02/http-header-splitting-in-gunicorn-19.4.5Exploit, Third Party Advisory
• https://github.com/benoitc/gunicorn/issues/1227Exploit, Issue Tracking, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2018/04/msg00022.htmlThird Party Advisory
• https://usn.ubuntu.com/4022-1/
• https://www.debian.org/security/2018/dsa-4186Third Party Advisory
• https://epadillas.github.io/2018/04/02/http-header-splitting-in-gunicorn-19.4.5Exploit, Third Party Advisory
• https://github.com/benoitc/gunicorn/issues/1227Exploit, Issue Tracking, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2018/04/msg00022.htmlThird Party Advisory
• https://usn.ubuntu.com/4022-1/
• https://www.debian.org/security/2018/dsa-4186Third Party Advisory

Published

Apr 18, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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