SUSE alert SUSE-SU-2026:3424-1 (python3-pyOpenSSL)

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SUSE-SU-2026:3424-1: low: Security update for python3-pyOpenSSL
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Thu, 30 Jul 2026 16:35:58 -0000
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<178542935825.1270.13666250464055061850@cdce4c525ac1>
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Article
# Security update for python3-pyOpenSSL

Announcement ID: SUSE-SU-2026:3424-1  
Release Date: 2026-07-30T11:07:53Z  
Rating: low  
References:

  * bsc#1259804

  
Cross-References:

  * CVE-2026-27448

  
CVSS scores:

  * CVE-2026-27448 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-27448 ( SUSE ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-27448 ( NVD ):  1.7

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/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-2026-27448 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

  
Affected Products:

  * Basesystem Module 15-SP7
  * openSUSE Leap 15.4
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Micro 5.5
  * SUSE Linux Enterprise Micro for Rancher 5.3
  * SUSE Linux Enterprise Micro for Rancher 5.4
  * SUSE Linux Enterprise Real Time 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 python3-pyOpenSSL fixes the following issue:

  * CVE-2026-27448: unhandled exception in `set_tlsext_servername_callback`
    callback can result in connection not being cancelled and allows for
    possible security measure bypassing (bsc#1259804).

## 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 Micro 5.5  
    zypper in -t patch SUSE-SLE-Micro-5.5-2026-3424=1

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-3424=1

  * SUSE Linux Enterprise Micro for Rancher 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-3424=1

  * SUSE Linux Enterprise Micro 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-3424=1

  * SUSE Linux Enterprise Micro for Rancher 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-3424=1

  * SUSE Linux Enterprise Micro 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-3424=1

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-3424=1

## Package List:

  * SUSE Linux Enterprise Micro for Rancher 5.3 (noarch)
    * python3-pyOpenSSL-21.0.0-150400.22.1
  * SUSE Linux Enterprise Micro 5.3 (noarch)
    * python3-pyOpenSSL-21.0.0-150400.22.1
  * openSUSE Leap 15.4 (noarch)
    * python3-pyOpenSSL-21.0.0-150400.22.1
  * SUSE Linux Enterprise Micro for Rancher 5.4 (noarch)
    * python3-pyOpenSSL-21.0.0-150400.22.1
  * SUSE Linux Enterprise Micro 5.4 (noarch)
    * python3-pyOpenSSL-21.0.0-150400.22.1
  * SUSE Linux Enterprise Micro 5.5 (noarch)
    * python3-pyOpenSSL-21.0.0-150400.22.1
  * Basesystem Module 15-SP7 (noarch)
    * python3-pyOpenSSL-21.0.0-150400.22.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-27448.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1259804



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