Home / mailings

PDF

[USN-8198-2] Tornado vulnerabilities

Posted on 28 April 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8198-2
April 28, 2026

python-tornado vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS

Summary:

Several security issues were fixed in Tornado.

Software Description:
- python-tornado: scalable, non-blocking web server and tools

Details:

USN-8198-1 fixed vulnerabilities in Tornado. This update provides the
corresponding updates for Ubuntu 26.04 LTS.

Original advisory 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)

Update instructions:

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

Ubuntu 26.04 LTS
python3-tornado 6.5.4-0.1ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-8198-2
https://ubuntu.com/security/notices/USN-8198-1
CVE-2026-31958, CVE-2026-35536

Package Information:
https://launchpad.net/ubuntu/+source/python-tornado/6.5.4-0.1ubuntu0.1

--===============1771704940230003868==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP