# waitress (PyPI) vulnerabilities

Source: https://junglewise.ai/threats/technologies/waitress  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/waitress.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 14 vulnerabilities in waitress (PyPI): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2024-49769, was published on 29 October 2024.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 14 (0 critical, 0 exploited in the wild)

## About waitress (PyPI)

Pure Python WSGI application server for serving HTTP requests.

## Latest waitress (PyPI) vulnerabilities

- [CVE-2024-49769: Waitress denial of service via unclean socket handling](https://junglewise.ai/threats/cve-2024-49769-waitress-denial-of-service-via-unclean-socket-handling) (low, CVSS 3.1, published 29 Oct 2024)
- [CVE-2024-49768: Waitress has request processing race condition in HTTP pipelining with invalid first request](https://junglewise.ai/threats/cve-2024-49768-waitress-has-request-processing-race-condition-in-http-pipelining) (low, CVSS 3.1, published 29 Oct 2024)
- [CVE-2022-31015: Uncaught Exception (due to a data race) leads to process termination in Waitress](https://junglewise.ai/threats/cve-2022-31015-uncaught-exception-due-to-a-data-race-leads-to-process) (low, CVSS 3.1, published 31 May 2022)
- [CVE-2022-24761: HTTP Request Smuggling in waitress](https://junglewise.ai/threats/cve-2022-24761-http-request-smuggling-in-waitress) (low, CVSS 3.1, published 17 Mar 2022)
- [CVE-2020-5236: Catastrophic backtracking in regex allows Denial of Service in Waitress](https://junglewise.ai/threats/cve-2020-5236-catastrophic-backtracking-in-regex-allows-denial-of-service-in) (low, CVSS 3.1, published 4 Feb 2020)
- [PYSEC-2020-197 - Waitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice…](https://junglewise.ai/threats/pysec-2020-197-waitress-through-version-1-3-1-allows-request-smuggling-9f6e1628) (info, published 22 Jan 2020)
- [CVE-2019-16792: Duplicate Advisory: Inconsistent Interpretation of HTTP Requests in Waitress](https://junglewise.ai/threats/cve-2019-16792-http-request-smuggling-content-length-sent-twice-in-waitress) (low, CVSS 3.1, published 22 Jan 2020)
- [CVE-2019-16789: HTTP Request Smuggling in Waitress: Invalid whitespace characters in headers (Follow-up)](https://junglewise.ai/threats/cve-2019-16789-http-request-smuggling-in-waitress-invalid-whitespace-characters) (low, CVSS 3.1, published 26 Dec 2019)
- [PYSEC-2019-68 - In Waitress through version 1.4.0, if a proxy server is used in front of waitress, an invalid request…](https://junglewise.ai/threats/pysec-2019-68-in-waitress-through-version-1-4-0-if-a-proxy-server-is-4705649e) (info, published 26 Dec 2019)
- [HTTP Request Smuggling: Invalid whitespace characters in headers in Waitress](https://junglewise.ai/threats/http-request-smuggling-invalid-whitespace-characters-in-headers-in-6de21fce) (info, published 26 Dec 2019)
- [PYSEC-2019-66 - Waitress through version 1.3.1 implemented a "MAY" part of the RFC7230 which states: "Although the…](https://junglewise.ai/threats/pysec-2019-66-waitress-through-version-1-3-1-implemented-a-may-part-of-f0ddf309) (info, published 20 Dec 2019)
- [CVE-2019-16786: HTTP Request Smuggling: Invalid Transfer-Encoding in Waitress](https://junglewise.ai/threats/cve-2019-16786-http-request-smuggling-invalid-transfer-encoding-in-waitress) (low, CVSS 3.1, published 20 Dec 2019)
- [PYSEC-2019-67 - Waitress through version 1.3.1 would parse the Transfer-Encoding header and only look for a single…](https://junglewise.ai/threats/pysec-2019-67-waitress-through-version-1-3-1-would-parse-the-transfer-95cbf730) (info, published 20 Dec 2019)
- [CVE-2019-16785: HTTP Request Smuggling: LF vs CRLF handling in Waitress](https://junglewise.ai/threats/cve-2019-16785-http-request-smuggling-lf-vs-crlf-handling-in-waitress) (low, CVSS 3.1, published 20 Dec 2019)

## Most severe waitress (PyPI) vulnerabilities

- [CVE-2019-16789: HTTP Request Smuggling in Waitress: Invalid whitespace characters in headers (Follow-up)](https://junglewise.ai/threats/cve-2019-16789-http-request-smuggling-in-waitress-invalid-whitespace-characters) (low, CVSS 3.1, published 26 Dec 2019)
- [CVE-2019-16785: HTTP Request Smuggling: LF vs CRLF handling in Waitress](https://junglewise.ai/threats/cve-2019-16785-http-request-smuggling-lf-vs-crlf-handling-in-waitress) (low, CVSS 3.1, published 20 Dec 2019)
- [CVE-2019-16786: HTTP Request Smuggling: Invalid Transfer-Encoding in Waitress](https://junglewise.ai/threats/cve-2019-16786-http-request-smuggling-invalid-transfer-encoding-in-waitress) (low, CVSS 3.1, published 20 Dec 2019)
- [CVE-2020-5236: Catastrophic backtracking in regex allows Denial of Service in Waitress](https://junglewise.ai/threats/cve-2020-5236-catastrophic-backtracking-in-regex-allows-denial-of-service-in) (low, CVSS 3.1, published 4 Feb 2020)
- [CVE-2019-16792: Duplicate Advisory: Inconsistent Interpretation of HTTP Requests in Waitress](https://junglewise.ai/threats/cve-2019-16792-http-request-smuggling-content-length-sent-twice-in-waitress) (low, CVSS 3.1, published 22 Jan 2020)
- [CVE-2022-24761: HTTP Request Smuggling in waitress](https://junglewise.ai/threats/cve-2022-24761-http-request-smuggling-in-waitress) (low, CVSS 3.1, published 17 Mar 2022)
- [CVE-2022-31015: Uncaught Exception (due to a data race) leads to process termination in Waitress](https://junglewise.ai/threats/cve-2022-31015-uncaught-exception-due-to-a-data-race-leads-to-process) (low, CVSS 3.1, published 31 May 2022)
- [CVE-2024-49769: Waitress denial of service via unclean socket handling](https://junglewise.ai/threats/cve-2024-49769-waitress-denial-of-service-via-unclean-socket-handling) (low, CVSS 3.1, published 29 Oct 2024)
- [CVE-2024-49768: Waitress has request processing race condition in HTTP pipelining with invalid first request](https://junglewise.ai/threats/cve-2024-49768-waitress-has-request-processing-race-condition-in-http-pipelining) (low, CVSS 3.1, published 29 Oct 2024)
- [PYSEC-2020-197 - Waitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice…](https://junglewise.ai/threats/pysec-2020-197-waitress-through-version-1-3-1-allows-request-smuggling-9f6e1628) (info, published 22 Jan 2020)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other PyPI technologies

- [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities
- [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities
- [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities
- [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities
- [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities
- [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities
- [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities
- [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities
- [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities
- [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities
- [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities
- [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "waitress (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/waitress, 13 November 2026.