CVE-2019-16792: Agendaless Waitress

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

Waitress 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 products

• Agendaless Waitress: up to and including 1.3.1
• Debian Debian Linux: version 9.0 only
• Oracle Communications Cloud Native Core Network Function Cloud Native Environment: version 1.10.0 only

Published 2020-01-22. Last modified 2026-06-17.