Upstream information

CVE-2026-27448 at MITRE

Description

pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it. Starting in version 26.0.0, unhandled exceptions now result in rejecting the connection.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail National Vulnerability Database SUSE
Base Score 5.3 3.7
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network Network
Attack Complexity Low High
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact Low Low
Availability Impact None None
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 1.7 6.3
Vector 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 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
Attack Vector Network Network
Attack Complexity High High
Attack Requirements Present Present
Privileges Required None None
User Interaction None None
Vulnerable System Confidentiality Impact None None
Vulnerable System Integrity Impact Low Low
Vulnerable System Availability Impact None None
Subsequent System Confidentiality Impact None None
Subsequent System Integrity Impact None None
Subsequent System Availability Impact None None
CVSSv4 Version 4.0 4.0
SUSE Bugzilla entry: 1259804 [IN_PROGRESS]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Container suse/sl-micro/6.0/kvm-os-container:latest
Container suse/sl-micro/6.1/kvm-os-container:2.2.0-3.3
  • qemu-guest-agent >= 8.2.10-slfo.1.1_4.1
Image SL-Micro
Image SL-Micro-Base-qcow
Image SL-Micro-Default
Image SL-Micro-Default-SelfInstall
Image SL-Micro-Default-encrypted
Image SL-Micro-Default-qcow
Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2
Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2
  • python311-pyOpenSSL >= 24.0.0-slfo.1.1_2.1
Image SLE-Micro-Azure
Image SLE-Micro-BYOS-Azure
  • cloud-regionsrv-client >= 10.5.2-7.1
  • cloud-regionsrv-client-license-watcher >= 1.0.0-7.1
  • cloud-regionsrv-client-plugin-azure >= 2.0.0-7.1
  • python311-pyOpenSSL >= 24.0.0-slfo.1.1_2.1
Image SLE-Micro-BYOS-GCE
Image SLE-Micro-GCE
  • cloud-regionsrv-client >= 10.5.2-7.1
  • cloud-regionsrv-client-license-watcher >= 1.0.0-7.1
  • cloud-regionsrv-client-plugin-gce >= 1.0.0-7.1
  • python311-pyOpenSSL >= 24.0.0-slfo.1.1_2.1
Image SLE-Micro
Image SLE-Micro-BYOS
Image SLE-Micro-BYOS-EC2
Image SLE-Micro-EC2
  • cloud-regionsrv-client >= 10.5.2-7.1
  • cloud-regionsrv-client-plugin-ec2 >= 1.0.5-7.1
  • python311-pyOpenSSL >= 24.0.0-slfo.1.1_2.1
SUSE Linux Enterprise Desktop 15 SP7
SUSE Linux Enterprise High Performance Computing 15 SP7
SUSE Linux Enterprise Module for Python 3 15 SP7
SUSE Linux Enterprise Server 15 SP7
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Module-Python3-15-SP7-2026-1192
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-1192
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-1192
SUSE Linux Enterprise High Performance Computing 15 SP4
SUSE Linux Enterprise Module for Public Cloud 15 SP4
SUSE Linux Enterprise Server 15 SP4
SUSE Manager Proxy 4.3
SUSE Manager Retail Branch Server 4.3
SUSE Manager Server 4.3
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Module-Public-Cloud-15-SP4-2026-1192
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-1192
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-1192
SUSE Linux Enterprise Server 15 SP4-LTSS
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-1192
SUSE Linux Enterprise Server 15 SP5-LTSS
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-1192
SUSE Linux Enterprise Server 15 SP6-LTSS
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-1192
SUSE Linux Enterprise Server 16.0
SUSE Linux Enterprise Server for SAP applications 16.0
  • python313-pyOpenSSL >= 25.0.0-160000.3.1
 Patchnames:
SUSE-SLES-16.0-439
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Module-Public-Cloud-15-SP4-2026-1192
SUSE-SLE-Product-SLES_SAP-15-SP4-2026-1192
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP5-2026-1192
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP6-2026-1192
SUSE Linux Micro 6.0
  • python311-pyOpenSSL >= 24.0.0-2.1
 Patchnames:
SUSE-SLE-Micro-6.0-649
SUSE Linux Micro 6.1
  • python311-pyOpenSSL >= 24.0.0-slfo.1.1_2.1
 Patchnames:
SUSE-SLE-Micro-6.1-467
openSUSE Leap 15.6
  • python311-pyOpenSSL >= 23.2.0-150400.3.13.1
 Patchnames:
openSUSE-SLE-15.6-2026-1192
openSUSE Leap 16.0
  • python313-pyOpenSSL >= 25.0.0-160000.3.1
 Patchnames:
openSUSE-Leap-16.0-439
openSUSE Tumbleweed
  • python311-pyOpenSSL >= 26.0.0-1.1
  • python313-pyOpenSSL >= 26.0.0-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10392

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Micro 5.2
  • python3-pyOpenSSL >= 19.0.0-150300.3.3.1
SUSE Linux Enterprise Server 16.0
  • python313-pyOpenSSL >= 25.0.0-160000.3.1
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
  • python-pyOpenSSL >= 17.1.0-4.32.1
  • python3-pyOpenSSL >= 17.1.0-4.32.1

First public cloud image revisions this CVE is fixed in:

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 python-pyOpenSSL Released
SUSE Linux Enterprise High Performance Computing 15 SP7 python-pyOpenSSL Released
SUSE Linux Enterprise Micro 5.2 python-pyOpenSSL In progress
SUSE Linux Enterprise Module for Python 3 15 SP7 python-pyOpenSSL Released
SUSE Linux Enterprise Server 15 SP7 python-pyOpenSSL Released
SUSE Linux Enterprise Server 16.0 python-pyOpenSSL In progress
SUSE Linux Enterprise Server 16.1 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 python-pyOpenSSL Released
SUSE Linux Enterprise Server for SAP applications 16.0 python-pyOpenSSL Released
SUSE Linux Enterprise Server for SAP applications 16.1 python-pyOpenSSL Affected
SUSE Linux Micro 6.0 python-pyOpenSSL Released
SUSE Linux Micro 6.1 python-pyOpenSSL Released
openSUSE Leap 15.6 python-pyOpenSSL Released
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4 python-pyOpenSSL Released
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python-pyOpenSSL Released
SUSE Linux Enterprise High Performance Computing 15 SP5 python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python-pyOpenSSL Released
SUSE Linux Enterprise Module for Public Cloud 15 SP4 python-pyOpenSSL Released
SUSE Linux Enterprise Module for Python 3 15 SP4 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Python 3 15 SP5 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Python 3 15 SP6 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP5 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP5-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP4 python-pyOpenSSL Released
SUSE Linux Enterprise Server 15 SP4-LTSS python-pyOpenSSL Released
SUSE Linux Enterprise Server 15 SP5 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP5-LTSS python-pyOpenSSL Released
SUSE Linux Enterprise Server 15 SP6 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP6-LTSS python-pyOpenSSL Released
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 python-pyOpenSSL In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP6 python-pyOpenSSL Released
SUSE Manager Proxy 4.3 python-pyOpenSSL Released
SUSE Manager Retail Branch Server 4.3 python-pyOpenSSL Released
SUSE Manager Server 4.3 python-pyOpenSSL Released
Products past their end of life and not receiving proactive updates anymore.
HPE Helion OpenStack 8 python-pyOpenSSL Affected
SUSE CaaS Platform 3.0 python-pyOpenSSL Affected
SUSE CaaS Platform 4.0 python-pyOpenSSL Affected
SUSE Enterprise Storage 6 python-pyOpenSSL Affected
SUSE Enterprise Storage 7 python-pyOpenSSL Affected
SUSE Enterprise Storage 7.1 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 12 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 12 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 12 SP4 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 15 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 15 SP1 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 15 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 15 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 15 SP4 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 15 SP5 python-pyOpenSSL Affected
SUSE Linux Enterprise Desktop 15 SP6 python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP1 python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS python-pyOpenSSL Released
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS python-pyOpenSSL Released
SUSE Linux Enterprise High Performance Computing 15 SP6 python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15-ESPOS python-pyOpenSSL Affected
SUSE Linux Enterprise High Performance Computing 15-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Micro 5.0 python-pyOpenSSL Affected
SUSE Linux Enterprise Micro 5.1 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Basesystem 15 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Basesystem 15 SP1 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Basesystem 15 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Python 2 15 SP1 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Python 2 15 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Module for Python 2 15 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT python-pyOpenSSL Affected
SUSE Linux Enterprise Real Time 15 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Real Time 15 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP2-BCL python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP2-ESPOS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP2-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP3-BCL python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP3-ESPOS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP3-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP4 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP4-ESPOS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 12 SP4-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP1 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP1-BCL python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP1-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP2-BCL python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP2-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP3-BCL python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15 SP3-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server 15-LTSS python-pyOpenSSL Affected
SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 15 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 python-pyOpenSSL Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 python-pyOpenSSL Released
SUSE Linux Enterprise Server for SAP Applications 15 SP5 python-pyOpenSSL Released
SUSE Manager Proxy 4.0 python-pyOpenSSL Affected
SUSE Manager Proxy 4.1 python-pyOpenSSL Affected
SUSE Manager Proxy 4.2 python-pyOpenSSL Affected
SUSE Manager Retail Branch Server 4.0 python-pyOpenSSL Affected
SUSE Manager Retail Branch Server 4.1 python-pyOpenSSL Affected
SUSE Manager Retail Branch Server 4.2 python-pyOpenSSL Affected
SUSE Manager Server 4.0 python-pyOpenSSL Affected
SUSE Manager Server 4.1 python-pyOpenSSL Affected
SUSE Manager Server 4.2 python-pyOpenSSL Affected
SUSE OpenStack Cloud 7 python-pyOpenSSL Affected
SUSE OpenStack Cloud 8 python-pyOpenSSL Affected
SUSE OpenStack Cloud 9 python-pyOpenSSL Affected
SUSE OpenStack Cloud Crowbar 8 python-pyOpenSSL Affected
SUSE OpenStack Cloud Crowbar 9 python-pyOpenSSL Affected
openSUSE Leap 15.3 python-pyOpenSSL Affected
openSUSE Leap 15.4 python-pyOpenSSL Released
openSUSE Leap 15.5 python-pyOpenSSL Affected
openSUSE Leap Micro 5.2 python-pyOpenSSL Affected

SUSE Timeline for this CVE

CVE page created: Wed Mar 18 02:00:47 2026
CVE page last modified: Tue Apr 7 22:45:10 2026