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CVE-2019-16792

24
FAUCET Score

CVE-2019-16792 describes a request smuggling vulnerability in Waitress versions prior to 1.4.0, impacting products like agendaless and Debian Waitress, as well as Oracle Communications Cloud Native Core Network Function. This flaw allows an attacker to bypass security controls by sending a double Content-Length header, causing Waitress to misinterpret the request body as a new, unauthenticated request. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low complexity, potentially leading to high integrity impact, though confidentiality and availability are not directly affected. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available, with minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.1CPE matchmatch criteria
cpe:2.3:a:agendaless:waitress:*:*:*:*:*:*:*:*
1.10.0CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.12%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0212 is in the 64th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
oraclepatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: waitressFixed in: 1.4.0

Vendor Advisories (1)

pipGHSA-4ppp-gpcr-7qf6critical

HTTP Request Smuggling: Content-Length Sent Twice in Waitress

Dec 20, 2019

References

docs.pylonsproject.org / projects/waitress/en/latest
Release Notes
github.com / Pylons/waitress/commit/575994cd42e83fd772a5f7ec98b2c56751bd3f65
Patch
github.com / Pylons/waitress/security/advisories/GHSA-4ppp-gpcr-7qf6
Third Party Advisory
lists.debian.org / debian-lts-announce/2022/05/msg00011.html
Mailing ListThird Party Advisory
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory