Skip to content
OpenAdvisories

Package · NuGet

log4net

3 known vulnerabilities.

All Critical High Medium Low Exploited only Public exploit

3 results · Feed

  • Medium 6.3
    CVE-2026-40021

    Apache Log4net: Silent log event loss in XmlLayout and XmlLayoutSchemaLog4J due to unescaped XML 1.0 forbidden characters

    Apache Log4net's XmlLayout https://logging.apache.org/log4net/manual/configuration/layouts.html#layout-list and XmlLayoutSchemaLog4J https://logging.apache.org/log4net/manual/configuration/layouts.html#layout-list , in versions before 3.3.0, fail to sanitize …

    Apache Software Foundation Apache Log4net log4net log4net Debian Ubuntu NuGet
  • Critical 9.8
    CVE-2018-1285 Public exploit EPSS 18%

    XML External Entity attack in log4net

    Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. This allows for XXE-based attacks in applications that accept attacker-controlled log4net configuration files.

    log4net log4net log4net Debian Ubuntu NuGet
  • Medium —
    CVE-2006-0743

    Apache log4net format string vulnerability causes DoS

    Format string vulnerability in LocalSyslogAppender in Apache log4net 1.2.9 might allow remote attackers to cause a denial of service (memory corruption and termination) via unknown vectors.

    log4net NuGet