Alerts This Week
Warning Icon 1 905
Alerts This Week
Warning Icon 1 905

Ubuntu 25.10 python-tornado Moderate Denial of Service USN-8198-1

ubuntu
Calendar Grey April 23, 2026
Dist Ubuntu Esm H88
Multiple security flaws fixed in Tornado for Ubuntu LTS versions including potential denial of service vulnerabilities.
Several security issues were fixed in Tornado.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in Tornado. Software Description: - python-tornado: scalable, non-blocking web server and tools Details: It was discovered that Tornado incorrectly handled parsing of large multipart request bodies. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-31958) It was discovered that Tornado did not properly validate characters in cookie values. An attacker could possibly use this issue to inject arbitrary cookie attributes. (CVE-2026-35536)

Topics%20covered

Topics Covered

security advisory moderate denial of service update Ubuntu python-tornado

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 python3-tornado 6.4.2-3ubuntu0.3 Ubuntu 24.04 LTS python3-tornado 6.4.0-1ubuntu0.5 Ubuntu 22.04 LTS python3-tornado 6.1.0-3ubuntu0.1~esm5 Available with Ubuntu Pro Ubuntu 20.04 LTS python3-tornado 6.0.3+really5.1.1-3ubuntu0.1~esm5 Available with Ubuntu Pro Ubuntu 18.04 LTS python-tornado 4.5.3-1ubuntu0.2+esm3 Available with Ubuntu Pro python3-tornado 4.5.3-1ubuntu0.2+esm3 Available with Ubuntu Pro Ubuntu 16.04 LTS python-tornado 4.2.1-1ubuntu3.1+esm3 Available with Ubuntu Pro python3-tornado 4.2.1-1ubuntu3.1+esm3 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8198-1

CVE-2026-31958, CVE-2026-35536

Ubuntu Security Notice USN-8198-1

Topics%20covered

Topics Covered

security advisory moderate denial of service update Ubuntu python-tornado

Package Information

https://launchpad.net/ubuntu/+source/python-tornado/6.4.2-3ubuntu0.3 https://launchpad.net/ubuntu/+source/python-tornado/6.4.0-1ubuntu0.5

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here