CVE-2026-105242

The Apache log4net logging framework (versions 1.2.11 through 3.5.0 ) is vulnerable to an Improper Handling of Exceptional Conditions (CWE-755) in the aspnet-request pattern converter. When reading request parameters, certain content—such as markup—triggers ASP.NET request validation , causing th...

EUVD-2026-93867

Improper Handling of Exceptional Conditions vulnerability in the aspnet-request pattern converter of Apache log4net. Reading request parameters triggers ASP.NET request validation, so a request carrying content such as markup made the layout throw and the appender discarded the whole event. A...