{"schema_version":"1.7.3","id":"GHSA-j7j6-7hfx-5522","published":"2022-05-24T17:07:06Z","modified":"2026-02-25T14:21:15.242040Z","withdrawn":"2026-01-22T22:34:03Z","aliases":["CVE-2019-16792","GHSA-4ppp-gpcr-7qf6","PYSEC-2020-178"],"summary":"Duplicate Advisory: Inconsistent Interpretation of HTTP Requests in Waitress","details":"## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-4ppp-gpcr-7qf6. This link is maintained to preserve external references.\n\n## Original Description\nWaitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice. Waitress would header fold a double Content-Length header and due to being unable to cast the now comma separated value to an integer would set the Content-Length to 0 internally. If two Content-Length headers are sent in a single request, Waitress would treat the request as having no body, thereby treating the body of the request as a new request in HTTP pipelining. This issue is fixed in Waitress 1.4.0.","affected":[{"package":{"name":"waitress","ecosystem":"PyPI","purl":"pkg:pypi/waitress"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.0"}]}],"versions":["0.1","0.2","0.3","0.4","0.5","0.6","0.6.1","0.7","0.8","0.8.1","0.8.10","0.8.11b0","0.8.2","0.8.3","0.8.4","0.8.5","0.8.6","0.8.7","0.8.8","0.8.9","0.9.0","0.9.0b0","0.9.0b1","1.0.0","1.0.1","1.0.2","1.0a1","1.0a2","1.1.0","1.2.0","1.2.0b1","1.2.0b2","1.2.0b3","1.2.1","1.3.0","1.3.0b0","1.3.1"],"database_specific":{"last_known_affected_version_range":"<= 1.3.1","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-j7j6-7hfx-5522/GHSA-j7j6-7hfx-5522.json"}}],"references":[{"type":"WEB","url":"https://github.com/Pylons/waitress/security/advisories/GHSA-4ppp-gpcr-7qf6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-16792"},{"type":"WEB","url":"https://github.com/Pylons/waitress/commit/575994cd42e83fd772a5f7ec98b2c56751bd3f65"},{"type":"WEB","url":"https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes"},{"type":"PACKAGE","url":"https://github.com/Pylons/waitress"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"}],"database_specific":{"cwe_ids":["CWE-444"],"github_reviewed":true,"github_reviewed_at":"2022-06-27T16:10:41Z","nvd_published_at":"2020-01-22T19:15:00Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}