SUSE-SU-2026:2725-1: important: Security update for python-tornado6

OPENSUSE-SECURITY-UPDATES <[email protected]>
Newsgroups gmane.linux.suse.security.announce
Message-ID <178302423056.377.5939775482012939101@1451accf52c7> 
# Security update for python-tornado6

Announcement ID: SUSE-SU-2026:2725-1  
Release Date: 2026-07-02T13:52:50Z  
Rating: important  
References:

  * bsc#1268395
  * bsc#1268396
  * bsc#1268397

  
Cross-References:

  * CVE-2026-49853
  * CVE-2026-49854
  * CVE-2026-49855

  
CVSS scores:

  * CVE-2026-49853 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
  * CVE-2026-49854 ( SUSE ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-49855 ( SUSE ):  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
  * 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-2026-49853: authorization header forwarded across cross-origin redirects
    in SimpleAsyncHTTPClient (bsc#1268395).
  * CVE-2026-49854: out-of-bounds memory access via C extension (bsc#1268396).
  * CVE-2026-49855: AsyncHTTPClient accumulates decompressed chunks without size
    limit (bsc#1268397).

## 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 15 SP5 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-2725=1

  * SUSE Linux Enterprise Server 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-2725=1

  * Python 3 Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Python3-15-SP7-2026-2725=1

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2725=1

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-2725=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-2725=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-2725=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-2725=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP6  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2725=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-2725=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-2725=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-2725=1

## Package List:

  * SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
    x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
    x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * Python 3 Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
    x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
    x86_64)
    * python311-tornado6-debuginfo-6.3.2-150400.9.18.1
    * python-tornado6-debugsource-6.3.2-150400.9.18.1
    * python311-tornado6-6.3.2-150400.9.18.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-49853.html
  * https://www.suse.com/security/cve/CVE-2026-49854.html
  * https://www.suse.com/security/cve/CVE-2026-49855.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1268395
  * https://bugzilla.suse.com/show_bug.cgi?id=1268396
  * https://bugzilla.suse.com/show_bug.cgi?id=1268397
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