Upstream information

CVE-2026-34479 at MITRE

Description

The Log4j1XmlLayout from the Apache Log4j 1-to-Log4j 2 bridge fails to escape characters forbidden by the XML 1.0 standard, producing malformed XML output. Conforming XML parsers are required to reject documents containing such characters with a fatal error, which may cause downstream log processing systems to drop or fail to index affected records.

Two groups of users are affected:

* Those using Log4j1XmlLayout directly in a Log4j Core 2 configuration file.
* Those using the Log4j 1 configuration compatibility layer with org.apache.log4j.xml.XMLLayout specified as the layout class.


Users are advised to upgrade to Apache Log4j 1-to-Log4j 2 bridge version 2.25.4, which corrects this issue.

Note: The Apache Log4j 1-to-Log4j 2 bridge is deprecated and will not be present in Log4j 3. Users are encouraged to consult the Log4j 1 to Log4j 2 migration guide https://logging.apache.org/log4j/2.x/migrate-from-log4j1.html , and specifically the section on eliminating reliance on the bridge.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail SUSE
Base Score 5.3
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact Low
CVSSv3 Version 3.1
CVSS v4 Scores
CVSS detail CNA (Apache Software Foundation)
Base Score 6.9
Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality Impact None
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact None
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact Low
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1262091 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • log4j >= 2.20.0-2.1
  • log4j-bom >= 2.20.0-2.1
  • log4j-javadoc >= 2.20.0-2.1
  • log4j-jcl >= 2.20.0-2.1
  • log4j-jmx-gui >= 2.20.0-2.1
  • log4j-nosql >= 2.20.0-2.1
  • log4j-slf4j >= 2.20.0-2.1
  • log4j-taglib >= 2.20.0-2.1
  • log4j-web >= 2.20.0-2.1
 Patchnames:
openSUSE-Tumbleweed-2026-10544

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Module for Basesystem 15 SP7
  • log4j >= 2.20.0-150200.4.33.1
  • log4j-javadoc >= 2.20.0-150200.4.33.1
  • log4j-jcl >= 2.20.0-150200.4.33.1
  • log4j-slf4j >= 2.20.0-150200.4.33.1
SUSE Linux Enterprise Server 15 SP7
  • log4j >= 2.20.0-150200.4.33.1
  • log4j-javadoc >= 2.20.0-150200.4.33.1
  • log4j-jcl >= 2.20.0-150200.4.33.1
  • log4j-slf4j >= 2.20.0-150200.4.33.1
SUSE Linux Enterprise Desktop 15 SP7
  • log4j >= 2.20.0-150200.4.33.1
  • log4j-javadoc >= 2.20.0-150200.4.33.1
  • log4j-jcl >= 2.20.0-150200.4.33.1
  • log4j-slf4j >= 2.20.0-150200.4.33.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • log4j >= 2.20.0-150200.4.33.1
  • log4j-javadoc >= 2.20.0-150200.4.33.1
  • log4j-jcl >= 2.20.0-150200.4.33.1
  • log4j-slf4j >= 2.20.0-150200.4.33.1
SUSE Linux Enterprise High Performance Computing 15 SP7
  • log4j >= 2.20.0-150200.4.33.1
  • log4j-javadoc >= 2.20.0-150200.4.33.1
  • log4j-jcl >= 2.20.0-150200.4.33.1
  • log4j-slf4j >= 2.20.0-150200.4.33.1

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 log4j In progress
SUSE Linux Enterprise High Performance Computing 15 SP7 log4j In progress
SUSE Linux Enterprise Module for Basesystem 15 SP7 log4j In progress
SUSE Linux Enterprise Server 15 SP7 log4j In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP7 log4j In progress
openSUSE Leap 15.6 log4j Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4 log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP5 log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS log4j Affected
SUSE Linux Enterprise Module for Basesystem 15 SP4 log4j Affected
SUSE Linux Enterprise Module for Basesystem 15 SP5 log4j Affected
SUSE Linux Enterprise Module for Basesystem 15 SP6 log4j Affected
SUSE Linux Enterprise Server 12 SP5 log4j Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS log4j Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security log4j Not affected
SUSE Linux Enterprise Server 15 SP4 log4j Affected
SUSE Linux Enterprise Server 15 SP4-LTSS log4j Affected
SUSE Linux Enterprise Server 15 SP5 log4j Affected
SUSE Linux Enterprise Server 15 SP5-LTSS log4j Affected
SUSE Linux Enterprise Server 15 SP6 log4j Affected
SUSE Linux Enterprise Server 15 SP6-LTSS log4j Affected
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 log4j Affected
SUSE Manager Proxy 4.3 log4j Affected
SUSE Manager Proxy LTS 4.3 log4j Affected
SUSE Manager Retail Branch Server 4.3 log4j Affected
SUSE Manager Retail Branch Server LTS 4.3 log4j Affected
SUSE Manager Server 4.3 log4j Affected
SUSE Manager Server LTS 4.3 log4j Affected
Products past their end of life and not receiving proactive updates anymore.
HPE Helion OpenStack 8 log4j Not affected
SUSE CaaS Platform 4.0 log4j Not affected
SUSE Enterprise Storage 6 log4j Not affected
SUSE Enterprise Storage 7.1 log4j Affected
SUSE Linux Enterprise Desktop 12 log4j Not affected
SUSE Linux Enterprise Desktop 12 SP1 log4j Not affected
SUSE Linux Enterprise Desktop 12 SP2 log4j Not affected
SUSE Linux Enterprise Desktop 12 SP3 log4j Not affected
SUSE Linux Enterprise Desktop 12 SP4 log4j Not affected
SUSE Linux Enterprise Desktop 15 log4j Not affected
SUSE Linux Enterprise Desktop 15 SP1 log4j Not affected
SUSE Linux Enterprise Desktop 15 SP3 log4j Affected
SUSE Linux Enterprise Desktop 15 SP4 log4j Affected
SUSE Linux Enterprise Desktop 15 SP5 log4j Affected
SUSE Linux Enterprise Desktop 15 SP6 log4j Affected
SUSE Linux Enterprise High Performance Computing 15 log4j Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1 log4j Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS log4j Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS log4j Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3 log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS log4j Affected
SUSE Linux Enterprise High Performance Computing 15 SP6 log4j Affected
SUSE Linux Enterprise High Performance Computing 15-ESPOS log4j Not affected
SUSE Linux Enterprise High Performance Computing 15-LTSS log4j Not affected
SUSE Linux Enterprise Module for Basesystem 15 log4j Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1 log4j Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP3 log4j Affected
SUSE Linux Enterprise Module for Development Tools 15 log4j Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP1 log4j Not affected
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT log4j Not affected
SUSE Linux Enterprise Real Time 15 SP3 log4j Affected
SUSE Linux Enterprise Real Time 15 SP4 log4j Affected
SUSE Linux Enterprise Server 12 log4j Not affected
SUSE Linux Enterprise Server 12 SP1 log4j Not affected
SUSE Linux Enterprise Server 12 SP1-LTSS log4j Not affected
SUSE Linux Enterprise Server 12 SP2 log4j Not affected
SUSE Linux Enterprise Server 12 SP2-BCL log4j Not affected
SUSE Linux Enterprise Server 12 SP2-ESPOS log4j Not affected
SUSE Linux Enterprise Server 12 SP2-LTSS log4j Not affected
SUSE Linux Enterprise Server 12 SP3 log4j Not affected
SUSE Linux Enterprise Server 12 SP3-BCL log4j Not affected
SUSE Linux Enterprise Server 12 SP3-ESPOS log4j Not affected
SUSE Linux Enterprise Server 12 SP3-LTSS log4j Not affected
SUSE Linux Enterprise Server 12 SP4 log4j Not affected
SUSE Linux Enterprise Server 12 SP4-ESPOS log4j Not affected
SUSE Linux Enterprise Server 12 SP4-LTSS log4j Not affected
SUSE Linux Enterprise Server 12-LTSS log4j Not affected
SUSE Linux Enterprise Server 15 log4j Not affected
SUSE Linux Enterprise Server 15 SP1 log4j Not affected
SUSE Linux Enterprise Server 15 SP1-BCL log4j Not affected
SUSE Linux Enterprise Server 15 SP1-LTSS log4j Not affected
SUSE Linux Enterprise Server 15 SP3 log4j Affected
SUSE Linux Enterprise Server 15 SP3-BCL log4j Affected
SUSE Linux Enterprise Server 15 SP3-LTSS log4j Affected
SUSE Linux Enterprise Server 15-LTSS log4j Not affected
SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 12 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP1 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 15 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 log4j Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 log4j Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 log4j Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 log4j Affected
SUSE Linux Enterprise Software Development Kit 12 log4j Not affected
SUSE Linux Enterprise Software Development Kit 12 SP1 log4j Not affected
SUSE Linux Enterprise Software Development Kit 12 SP2 log4j Not affected
SUSE Linux Enterprise Software Development Kit 12 SP3 log4j Not affected
SUSE Linux Enterprise Software Development Kit 12 SP4 log4j Not affected
SUSE Linux Enterprise Software Development Kit 12 SP5 log4j Not affected
SUSE Manager Proxy 4.0 log4j Not affected
SUSE Manager Proxy 4.2 log4j Affected
SUSE Manager Retail Branch Server 4.0 log4j Not affected
SUSE Manager Retail Branch Server 4.2 log4j Affected
SUSE Manager Server 4.0 log4j Not affected
SUSE Manager Server 4.2 log4j Affected
SUSE OpenStack Cloud 7 log4j Not affected
SUSE OpenStack Cloud 8 log4j Not affected
SUSE OpenStack Cloud 9 log4j Not affected
SUSE OpenStack Cloud Crowbar 8 log4j Not affected
SUSE OpenStack Cloud Crowbar 9 log4j Not affected
openSUSE Leap 15.3 log4j Affected
openSUSE Leap 15.4 log4j Affected
openSUSE Leap 15.5 log4j Affected
Container Status
suse/manager/5.0/x86_64/server
suse/manager/5.0/x86_64/server-attestation
suse/multi-linux-manager/5.1/x86_64/server
suse/multi-linux-manager/5.1/x86_64/server-attestation
suse/multi-linux-manager/5.2/x86_64/server
suse/multi-linux-manager/5.2/x86_64/server-attestation		 log4jAffected

SUSE Timeline for this CVE

CVE page created: Fri Apr 10 18:02:16 2026
CVE page last modified: Wed Apr 15 20:51:37 2026