CVE-2026-34479
highPriorität · verfolgen · 30EPSS 0.005 · 45. PerzentilDEEUFRRUUSEPSS · bewertet 2026-10-27
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.
cvss
Technischer Schweregrad, 0–10. Eine Zeile je Quelle.
Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · low–high · 2.7–7.5
SSVC
Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.
schwächen
Die CWE-Schwächeklassen, zu denen dies gehört.
betroffene Produkte (39)
Betroffene Produkte und Versionsbereiche.
- IBM InfoSphere Information Serveralle Versionencert_bundDEcpe:/a:ibm:infosphere_information_server:-
- IBM SPSS Collaboration and Deployment Servicesalle Versionencert_bundDEcpe:/a:ibm:spss:collaboration_and_deployment_services
- IBM Tivoli Netcool/OMNIbus 8.1.0-8.1.0.36alle Versionencert_bundDEcpe:/a:ibm:tivoli_netcool%2fomnibus:8.1.0_-_8.1.0.36
- IBM Tivoli Network Manager IP Edition 4.2.0alle Versionencert_bundDEcpe:/a:ibm:tivoli_network_manager:ip_edition_4.2.0
- Red Hat Enterprise Linux Offline Knowledge Portalalle Versionencert_bundDEcpe:/o:redhat:enterprise_linux:offline_knowledge_portal
Advisories (4)
Hersteller- und Ökosystem-Meldungen dazu.
- WID-SEC-W-2026-1067Apache log4j: Mehrere Schwachstellen ermöglichen Manipulation von DateienDeutsch2026-04-12csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache log4j ausnutzen, um Dateien zu manipulieren.
- WID-SEC-W-2026-2260IBM Operational Decision Manager: Mehrere SchwachstellenDeutsch2026-07-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM Operational Decision Manager ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.
- GHSA-h383-gmxw-35v2Apache Log4j 1 to Log4j 2 bridge: silent log event loss in Log4j1XmlLayout due to unescaped XML 1.0 forbidden characters2026-04-10ghsa · osvUS
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.
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
auch bekannt als (4)
Weitere Namen und Kennungen dieser Entität.
quellen
Welche Quellen diesen Datensatz belegen und wann.
Referenzen (18)
Externe Belege — Patches, Meldungen, Analysen.
- http://www.openwall.com/lists/oss-security/2026/04/10/8cnnvd
- https://github.com/apache/logging-log4j2/pull/4078cnnvd
- https://lists.apache.org/thread/gd0hp6mj17rn3kj279vgy4p7kd4zz5oncnnvd
- https://logging.apache.org/cyclonedx/vdr.xmlcnnvd
- https://logging.apache.org/log4j/2.x/migrate-from-log4j1.htmlcnnvd
- https://logging.apache.org/security.html#CVE-2026-34479cnnvd
- https://vigilance.fr/vulnerability/Apache-Log4j-multiple-vulnerabilities-dated-10-04-2026-50425cnnvd
- https://github.com/apache/logging-log4j2/pull/4078enisa_euvd
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