Security update for python-tornado6

Announcement ID:	SUSE-SU-2026:0010-1
Release Date:	2026-01-05T10:27:06Z
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:	openSUSE Leap 15.4 openSUSE Leap 15.6 Python 3 Module 15-SP7 SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP5 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server 15 SP4 LTSS SUSE Linux Enterprise Server 15 SP5 SUSE Linux Enterprise Server 15 SP5 LTSS SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server 15 SP6 LTSS SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP7

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 to 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 High Performance Computing LTSS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-10=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-10=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-10=1
• SUSE Linux Enterprise Server 15 SP4 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-10=1
• SUSE Linux Enterprise Server 15 SP5 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-10=1
• SUSE Linux Enterprise Server 15 SP6 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-10=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-10=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-10=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-10=1
• openSUSE Leap 15.4
  zypper in -t patch SUSE-2026-10=1
• openSUSE Leap 15.6
  zypper in -t patch openSUSE-SLE-15.6-2026-10=1
• Python 3 Module 15-SP7
  zypper in -t patch SUSE-SLE-Module-Python3-15-SP7-2026-10=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-10=1

Package List:

• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64 x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64 x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64 x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64 i586)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• Python 3 Module 15-SP7 (aarch64 ppc64le s390x x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64 x86_64)
  • python311-tornado6-6.3.2-150400.9.12.1
  • python-tornado6-debugsource-6.3.2-150400.9.12.1
  • python311-tornado6-debuginfo-6.3.2-150400.9.12.1

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