# CVE-2024-49769

## Summary

- **CVE ID:** CVE-2024-49769
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-772
- **Published:** Oct 29, 2024
- **Last Modified:** Mar 13, 2026

## Description

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

- Pylons — waitress (< 3.0.1)

## References

- [CNA](https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6)
- [CNA](https://github.com/Pylons/waitress/issues/418)
- [CNA](https://github.com/Pylons/waitress/pull/435)
- [CNA](https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c)
- [CVE](https://lists.debian.org/debian-lts-announce/2024/11/msg00012.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.38%
- **EPSS Percentile:** 70.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._