SUSE-SU-2026:2828-1: moderate: Security update for python-idna

# Security update for python-idna

Announcement ID: SUSE-SU-2026:2828-1  
Release Date: 2026-07-09T18:30:14Z  
Rating: moderate  
References:

  * bsc#1265413

  
Cross-References:

  * CVE-2026-45409

  
CVSS scores:

  * CVE-2026-45409 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-45409 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-45409 ( NVD ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-45409 ( 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
  * Public Cloud Module 15-SP4
  * Python 3 Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7
  * SUSE Manager Proxy 4.3
  * SUSE Manager Retail Branch Server 4.3
  * SUSE Manager Server 4.3

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for python-idna fixes the following issue

  * CVE-2026-45409: specially crafted inputs to idna.encode() can bypass earlier
    security fix (bsc#1265413).

## 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-SP7-2026-2828=1

  * Public Cloud Module 15-SP4  
    zypper in -t patch SUSE-SLE-Module-Public-Cloud-15-SP4-2026-2828=1

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-2828=1

## Package List:

  * Python 3 Module 15-SP7 (noarch)
    * python311-idna-3.4-150400.11.13.1
  * Public Cloud Module 15-SP4 (noarch)
    * python311-idna-3.4-150400.11.13.1
  * openSUSE Leap 15.4 (noarch)
    * python311-idna-3.4-150400.11.13.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-45409.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1265413