5.3
Medium
CVE-2026-105242 Improper Handling of Exceptional Conditions vulnerability in the aspnet-request pattern converter of Apache log4net
Description
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 sender could suppress the log record of their own request. Only applications on ASP.NET for .NET Framework whose layout uses %aspnet-request are affected. This issue affects Apache log4net: from 1.2.11 before 3.5.0. Users are recommended to upgrade to version 3.5.0, which fixes the issue.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Log4net | Versions not published |
References
- github.com github.com
- github.com github.com
- lists.apache.org lists.apache.org
Timeline
- Published
- Last modified
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