EUVD-2026-21409

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...

PT-2026-31941

Name of the Vulnerable Software and Affected Versions Apache Log4j 1-to-Log4j 2 bridge versions prior to 2.25.4 Description The Log4j1XmlLayout component fails to escape characters forbidden by the XML 1.0 standard, resulting in malformed XML output. Because conforming XML parsers must reject...