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.
Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
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Wed, 07 Oct 2026 15:30:00 +0000
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ssvc
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Wed, 07 Oct 2026 07:30:00 +0000
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Tue, 06 Oct 2026 23:15:00 +0000
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Apache
Apache log4net |
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Apache
Apache log4net |
Tue, 06 Oct 2026 20:00:00 +0000
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| 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. | |
| Title | Apache log4net: Request validation failure drops the event in the aspnet-request converter | |
| Weaknesses | CWE-755 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: apache
Published:
Updated: 2026-10-07T14:49:06.441Z
Reserved: 2026-10-04T16:21:12.546Z
Link: CVE-2026-105242
Updated: 2026-10-07T06:11:58.703Z
Status : Awaiting Analysis
Published: 2026-10-06T20:17:16.037
Modified: 2026-10-07T15:17:06.863
Link: CVE-2026-105242
No data.
OpenCVE Enrichment
Updated: 2026-10-07T00:45:09Z