SUSE alert SUSE-SU-2026:20028-1 (python-tornado6)

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SLE-SECURITY-UPDATES <null@suse.de>
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sle-security-updates@lists.suse.com
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SUSE-SU-2026:20028-1: important: Security update for python-tornado6
Date:
             
 
Thu, 15 Jan 2026 08:34:59 -0000
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<176846609987.28753.404504853730600070@smelt2.prg2.suse.org>


# Security update for python-tornado6

Announcement ID: SUSE-SU-2026:20028-1  
Release Date: 2026-01-12T10:29:37Z  
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 ):  5.3
    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-2025-67724 ( 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 ( NVD ):  5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2025-67724 ( NVD ):  6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * 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-2025-67725 ( 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 ( NVD ):  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
  * 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 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP Applications 16.0

  
  
An update that solves three vulnerabilities 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 SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-129=1

  * SUSE Linux Enterprise Server for SAP Applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-129=1

## Package List:

  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * python-tornado6-debugsource-6.5-160000.3.1
    * python313-tornado6-6.5-160000.3.1
    * python313-tornado6-debuginfo-6.5-160000.3.1
  * SUSE Linux Enterprise Server for SAP Applications 16.0 (ppc64le x86_64)
    * python-tornado6-debugsource-6.5-160000.3.1
    * python313-tornado6-6.5-160000.3.1
    * python313-tornado6-debuginfo-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
  * https://bugzilla.suse.com/show_bug.cgi?id=1254903
  * https://bugzilla.suse.com/show_bug.cgi?id=1254904
  * https://bugzilla.suse.com/show_bug.cgi?id=1254905



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