CVE-2026-105242

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.

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Produits concernés

• Apache Software Foundation Apache log4net
• Apache log4net

Scores CVSS

Faiblesses (CWE)

• CWE-755

Références

• https://github.com/apache/logging-log4net/commit/145203420c579a703008b4b723b6a080757f4964 Patch
• https://github.com/apache/logging-log4net/pull/316 Patch
• https://lists.apache.org/thread.html/zg6dbqm4ztm7j3c21nfsqj0yxm5yrpdx Mailing ListVendor Advisory
• http://www.openwall.com/lists/oss-security/2026/10/07/16 Mailing ListThird Party Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories