SUSE alert openSUSE-SU-2026:20015-1 (python-tornado6)

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meissner@suse.com
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security-announce@lists.opensuse.org
Subject:
             
 
openSUSE-SU-2026:20015-1: important: Security update for python-tornado6
Date:
             
 
Tue, 13 Jan 2026 17:51:53 +0100
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<20260113165153.334E5FBA1@maintenance.suse.de>
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Article
openSUSE security update: security update for python-tornado6
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:20015-1
Rating: important
References:

  * bsc#1254903
  * bsc#1254904
  * bsc#1254905



Cross-References:

  * CVE-2025-67724
  * CVE-2025-67725
  * CVE-2025-67726



CVSS scores:

  * CVE-2025-67724 ( SUSE ): 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-67724 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-67725 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-67725 ( SUSE ): 8.7 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
  * CVE-2025-67726 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-67726 ( SUSE ): 8.7 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 3 vulnerabilities and has 3 bug fixes can now be installed.

Description:

This update for python-tornado6 fixes the following issues:

- CVE-2025-67724: unescaped `reason` argument used in HTTP headers and in HTML default error pages
can be used by
  attackers to launch header injection or XSS attacks (bsc#1254903).
- CVE-2025-67725: quadratic complexity of string concatenation operations used by the
`HTTPHeaders.add` method can lead
  o DoS when processing a maliciously crafted HTTP request (bsc#1254905).
- CVE-2025-67726: quadratic complexity algorithm used in the `_parseparam` function of
`httputil.py` can lead to DoS
  when processing maliciously crafted parameters in a `Content-Disposition` header (bsc#1254904).


Patch instructions:

   To install this openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-129=1

Package List:

- openSUSE Leap 16.0:

  python313-tornado6-6.5-160000.3.1

References:

  * https://www.suse.com/security/cve/CVE-2025-67724.html
  * https://www.suse.com/security/cve/CVE-2025-67725.html
  * https://www.suse.com/security/cve/CVE-2025-67726.html