Detections
Analytics
SCA: security update for waitress (GHSA-g2xc-35jw-c63p)
medium Tenable Cloud Security Plugin ID 422943
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Waitress through version 1.3.1 would parse the Transfer-Encoding header and only look for a single string
value, if that value was not chunked it would fall through and use the Content-Length header instead.
According to the HTTP standard Transfer-Encoding should be a comma separated list, with the inner-most
encoding first, followed by any further transfer codings, ending with chunked. Requests sent with:
"Transfer-Encoding: gzip, chunked" would incorrectly get ignored, and the request would use a Content-
Length header instead to determine the body size of the HTTP message. This could allow for Waitress to
treat a single request as multiple requests in the case of HTTP pipelining. This issue is fixed in
Waitress 1.4.0. (CVE-2019-16786)
See Also
Plugin Details
Severity: Medium
ID: 422943
Version: Revision 1.3
Type: Local
Family: SCA Checks
Published: 3/29/2025
Updated: 1/27/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3.6
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2019-16786
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 5.1
Threat Score: 1.2
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 12/20/2019
Vulnerability Publication Date: 12/20/2019
Reference Information
CVE: CVE-2019-16786
cwe: CWE-444