Product by Apache Software Foundation

    Apache Log4j Core

    4 known vulnerabilities in Apache Log4j Core (Apache Software Foundation), 0 of them actively exploited (CISA KEV).

    Key figures

    4

    Vulnerabilities

    0

    Actively exploited (KEV)

    0

    Used by ransomware

    0

    Critical

    Vulnerabilities

    Actively exploited vulnerabilities (CISA KEV) first, then by priority. Click a column header to re-sort the table.

    Vulnerabilities in Apache Log4j Core (Apache Software Foundation)
    HighCVE-2026-34480

    Apache Log4j Core: Silent log event loss in XmlLayout due to unescaped XML 1.0 forbidden characters

    also in 5 other products

    		7.5
    HighCVE-2026-34478

    Apache Log4j Core: Log injection in Rfc5424Layout due to silent configuration incompatibility

    also in 3 other products

    		7.5
    MediumCVE-2025-68161

    Apache Log4j Core: Missing TLS hostname verification in Socket appender

    also in 10 other products

    		4.8
    MediumCVE-2026-34477

    Apache Log4j Core: Improper Validation of Certificate with Host Mismatch

    also in 4 other products

    		5.9

    All products by Apache Software Foundation