DEBIAN-CVE-2026-34479
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-34479
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34479.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-34479
- Upstream
- Published
- 2026-04-10T16:16:31Z
- Modified
- 2026-09-01T16:06:40Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:12 / apache-log4j2
Package
- Name
- apache-log4j2
- Purl
- pkg:deb/debian/apache-log4j2?arch=source&distro=bookworm
Debian:13 / apache-log4j2
Package
- Name
- apache-log4j2
- Purl
- pkg:deb/debian/apache-log4j2?arch=source&distro=trixie
Debian:14 / apache-log4j2
Package
- Name
- apache-log4j2
- Purl
- pkg:deb/debian/apache-log4j2?arch=source&distro=forky