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Debian dla-4520 : python-tornado-doc - security update
high Nessus Plugin ID 304503
Synopsis
The remote Debian host is missing a security-related update.Description
The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4520 advisory.------------------------------------------------------------------------- Debian LTS Advisory DLA-4520-1 [email protected] https://www.debian.org/lts/security/ Daniel Leidert April 01, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------
Package : python-tornado Version : 6.1.0-1+deb11u4 CVE ID : CVE-2026-31958 Debian Bug : 1130507 1132367
Tornado is a scalable, non-blocking Python web framework and asynchronous networking library.
CVE-2026-31958
Introduce new limits on the size and complexity of multipart bodies, including a default limit of 100 parts per request to mitigate a possible DoS. It is also possible to disable parsing multipart/form- data entirely if not required
GHSA-78cv-mqj4-43f7 (CVE not available yet)
Values passed to the domain, path, and samesite arguments of RequestHandler.set_cookie are not completely validated. In particular, semicolons are allowed, which could be used to inject attacker-controlled values for other cookie attributes.
For Debian 11 bullseye, this problem has been fixed in version 6.1.0-1+deb11u4.
We recommend that you upgrade your python-tornado packages.
For the detailed security status of python-tornado please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/python-tornado
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: This is a digitally signed message part
Tenable has extracted the preceding description block directly from the Debian security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade the python-tornado-doc packages.See Also
http://www.nessus.org/u?dd335af5
Plugin Details
Severity: High
ID: 304503
File Name: debian_DLA-4520.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Debian Local Security Checks
Published: 4/1/2026
Updated: 4/1/2026
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-31958
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:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.7
Threat Score: 6.6
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:python3-tornado, p-cpe:/a:debian:debian_linux:python-tornado-doc
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Ease: No known exploits are available
Patch Publication Date: 4/1/2026
Vulnerability Publication Date: 3/11/2026
Reference Information
CVE: CVE-2026-31958