CVE-2026-105243
CVE-2026-105243: 1 tracked advisory record across Apache. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Apache
1 advisory- Advisory severityMedium5.3
Medium [CVE-2026-105243] Insufficient Logging vulnerability in the EventLogAppender of Apache log4net
CVE-2026-105243Source published Source updated
Insufficient Logging vulnerability in the EventLogAppender of Apache log4net. Long messages were truncated to a fixed size that exceeds what the Windows Event Log accepts once the log and source names are counted, and the event log then stored nothing and reported nothing. A party whose data reaches a log message could suppress the whole record by making it long enough. Only applications on Windows that use EventLogAppender are affected. This issue affects Apache log4net: from 1.2.9 before 3.5.0. Users are recommended to upgrade to version 3.5.0, which fixes the issue.
- Related products — impact not confirmed
- Apache log4net
- Source-reported affected versions
- 1.2.9 before 3.5.0
- Source-reported fixed versions
- 3.5.0
- Mitigation guidance
- Users are recommended to upgrade to version 3.5.0, which fixes the issue.
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