SUSE-SU-2026:22430-1: important: Security update for python-tornado6

[SLE-SECURITY-UPDATES]

# Security update for python-tornado6

Announcement ID: SUSE-SU-2026:22430-1  
Release Date: 2026-06-26T09:07:54Z  
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:

  * SUSE Linux Micro 6.0

  
  
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 Micro 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-770=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * python311-tornado6-6.4-6.1
    * python311-tornado6-debuginfo-6.4-6.1
    * python-tornado6-debugsource-6.4-6.1

## 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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