{"action":"Upgrade waitress to 1.4.0 or later.","affected":[{"fixed":"1.4.0","introduced":"0"}],"component":"waitress","cve_ids":["CVE-2019-16786"],"ecosystem":"PyPI","epss":0.02379,"exploited":false,"fixed_versions":["1.4.0"],"ghsa_id":"GHSA-g2xc-35jw-c63p","id":"tcs_01M5KFGHM612QEV6JYGQAT9973","modified_at":"2026-07-08T05:59:57.212266307Z","published_at":"2019-12-20T23:04:18Z","references":["https://osv.dev/vulnerability/GHSA-g2xc-35jw-c63p","https://github.com/Pylons/waitress/security/advisories/GHSA-g2xc-35jw-c63p","https://nvd.nist.gov/vuln/detail/CVE-2019-16786","https://github.com/Pylons/waitress/commit/f11093a6b3240fc26830b6111e826128af7771c3","https://access.redhat.com/errata/RHSA-2020:0720","https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes","https://github.com/Pylons/waitress","https://github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2019-137.yaml","https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5","https://www.oracle.com/security-alerts/cpuapr2022.html"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"GHSA-g2xc-35jw-c63p","url":"https://osv.dev/vulnerability/GHSA-g2xc-35jw-c63p"}],"summary":"HTTP Request Smuggling: Invalid Transfer-Encoding in Waitress"}