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CVE-2026-34479 Apache Log4j 1 to Log4j 2 bridge: Silent log event loss in Log4j1XmlLayout due to unescaped XML 1.0 forbidden characters

cve-2026-34479log4jxml-escaping
  • What: Silent log event loss in Log4j1XmlLayout due to unescaped XML 1.0 forbidden characters
  • Impact: Could lead to missing log entries or data loss
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