Upstream information

CVE-2026-34480 at MITRE

Description

Apache Log4j Core's XmlLayout https://logging.apache.org/log4j/2.x/manual/layouts.html#XmlLayout , in versions up to and including 2.25.3, fails to sanitize characters forbidden by the XML 1.0 specification https://www.w3.org/TR/xml/#charsets producing invalid XML output whenever a log message or MDC value contains such characters.

The impact depends on the StAX implementation in use:

* JRE built-in StAX: Forbidden characters are silently written to the output, producing malformed XML. Conforming parsers must reject such documents with a fatal error, which may cause downstream log-processing systems to drop the affected records.
* Alternative StAX implementations (e.g., Woodstox https://github.com/FasterXML/woodstox , a transitive dependency of the Jackson XML Dataformat module): An exception is thrown during the logging call, and the log event is never delivered to its intended appender, only to Log4j's internal status logger.


Users are advised to upgrade to Apache Log4j Core 2.25.4, which corrects this issue by sanitizing forbidden characters before XML output.

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 6.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact Low
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: 1262092 [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 18:29:34 2026
CVE page last modified: Wed Apr 15 20:51:38 2026