CVE-2019-16792

Name: CVE-2019-16792
Creator: NVD / NIST
Published: 2020-01-22T19:15:11.14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.12%

Last modified Jun 17, 2026

CVE-2019-16792 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 2.12% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

2.12%

79.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Agendaless	Waitress	<= 1.3.1
Oracle	Communications Cloud Native Core Network Function Cloud Native Environment	1.10.0
Debian	Debian Linux	9.0

References

https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixesRelease Notes
https://github.com/Pylons/waitress/commit/575994cd42e83fd772a5f7ec98b2c56751bd3f65Patch
https://github.com/Pylons/waitress/security/advisories/GHSA-4ppp-gpcr-7qf6Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00011.htmlMailing List, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixesRelease Notes
https://github.com/Pylons/waitress/commit/575994cd42e83fd772a5f7ec98b2c56751bd3f65Patch
https://github.com/Pylons/waitress/security/advisories/GHSA-4ppp-gpcr-7qf6Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00011.htmlMailing List, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory

Timeline

Published: Jan 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16792?

How severe is CVE-2019-16792?

CVE-2019-16792 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.12% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16792?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16792?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST