CVE-2024-49769: Agendaless Waitress

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could run waitress out of available sockets with very little resources required. Waitress 3.0.1 contains fixes that remove the race condition.

Affected products

• Agendaless Waitress: before 3.0.1 (fixed in 3.0.1)

Published 2024-10-29. Last modified 2026-06-17.