SUSE-SU-2026:3970-1: moderate: Security update for python-h2

[SLE-SECURITY-UPDATES]

# Security update for python-h2

Announcement ID: SUSE-SU-2026:3970-1  
Release Date: 2026-09-04T08:20:20Z  
Rating: moderate  
References:

  * bsc#1274386

  
Cross-References:

  * CVE-2026-71554

  
CVSS scores:

  * CVE-2026-71554 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-71554 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

  
Affected Products:

  * openSUSE Leap 15.4
  * Python 3 Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for python-h2 fixes the following issue:

  * CVE-2026-71554: duplicate `Host` headers are accepted and forwarded to
    consuming applications, which can lead to request smuggling (bsc#1274386).

## 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:

  * Python 3 Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Python3-15-SP7-2026-3970=1

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-3970=1

## Package List:

  * openSUSE Leap 15.4 (noarch)
    * python311-h2-4.1.0-150400.8.9.1
  * Python 3 Module 15-SP7 (noarch)
    * python311-h2-4.1.0-150400.8.9.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-71554.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1274386

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