Ubuntu releases security updates for Tornado web server vulnerabilities

Brief written by the FOSSWire AI editor from Ubuntu How we write

October 22, 2026 1 min read

Key Takeaway

Multiple vulnerabilities in the Tornado Python web framework could allow attackers to cause denial of service, expose sensitive data, or bypass access controls.

Summary

Ubuntu has issued security updates for the python3-tornado package to address several vulnerabilities. These flaws stem from improper handling of certain HTTP requests and network inputs. The updates affect multiple Ubuntu releases, including 24.04 LTS, 22.04 LTS, and older versions via Ubuntu Pro.

Vulnerability details

The vulnerabilities involve improper handling of HTTP requests and network inputs.
Potential impacts include denial of service (DoS), sensitive information exposure, and access control bypass.
Affected CVEs include: CVE-2023-54397, CVE-2024-14029, CVE-2026-91990, CVE-2026-91992, CVE-2026-103262, and CVE-2026-103263.
Fixed versions vary by release: 6.5.5-5ubuntu1.1 for 26.10, 6.5.4-0.1ubuntu0.2 for 26.04 LTS, and 6.4.0-1ubuntu0.6 for 24.04 LTS.

Why it matters

Users running Tornado-based web services on Ubuntu should update their packages immediately to prevent potential exploitation.

Original reference: ubuntu.com →