{"id":"CVE-2018-1000164","details":"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.","aliases":["GHSA-32pc-xphx-q4f6","PYSEC-2018-55"],"modified":"2026-07-08T05:50:11.644600145Z","published":"2018-04-18T19:29:00.707Z","database_specific":{"unresolved_ranges":[{"vendor_product":"debian:debian_linux","cpes":["cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"7.0"},{"last_affected":"7.0"},{"introduced":"8.0"},{"last_affected":"8.0"}],"source":"CPE_STRING"}]},"references":[{"type":"WEB","url":"https://usn.ubuntu.com/4022-1/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/04/msg00022.html"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4186"},{"type":"REPORT","url":"https://github.com/benoitc/gunicorn/issues/1227"},{"type":"EVIDENCE","url":"https://epadillas.github.io/2018/04/02/http-header-splitting-in-gunicorn-19.4.5"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/benoitc/gunicorn","events":[{"introduced":"6dcd7a6ada1b6f9bd9d2840b12b4a6cee0e96301"},{"last_affected":"6dcd7a6ada1b6f9bd9d2840b12b4a6cee0e96301"}],"database_specific":{"cpe":"cpe:2.3:a:gunicorn:gunicorn:19.4.5:*:*:*:*:*:*:*","extracted_events":[{"introduced":"19.4.5"},{"last_affected":"19.4.5"}],"source":"CPE_STRING"}}],"versions":["19.4.5"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1000164.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}