USN-8952-1: Tornado vulnerabilities

Publication date

22 October 2026

Overview

Tornado could be made to crash or expose sensitive information if it received specially crafted network traffic.


Packages

Details

It was discovered that Tornado did not properly handle certain HTTP requests
and network inputs. An attacker could possibly use these issues to cause a
denial of service, expose sensitive information, or bypass access controls.

(CVE-2023-54397, CVE-2024-14029, CVE-2026-91990, CVE-2026-91992,
CVE-2026-103262, CVE-2026-103263)

It was discovered that Tornado did not properly handle certain HTTP requests
and network inputs. An attacker could possibly use these issues to cause a
denial of service, expose sensitive information, or bypass access controls.

(CVE-2023-54397, CVE-2024-14029, CVE-2026-91990, CVE-2026-91992,
CVE-2026-103262, CVE-2026-103263)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.10 stonking python3-tornado –  6.5.5-5ubuntu1.1
26.04 LTS resolute python3-tornado –  6.5.4-0.1ubuntu0.2
24.04 LTS noble python3-tornado –  6.4.0-1ubuntu0.6
22.04 LTS jammy python3-tornado –  6.1.0-3ubuntu0.1~esm6  
20.04 LTS focal python3-tornado –  6.0.3+really5.1.1-3ubuntu0.1~esm7  
18.04 LTS bionic python3-tornado –  4.5.3-1ubuntu0.2+esm4  
16.04 LTS xenial python3-tornado –  4.2.1-1ubuntu3.1+esm4  

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