CVEvulnerability

CVE-2026-105243

5.3 MEDIUM Published 2026-10-06 Modified 2026-10-09 Official page ↗
Status
Analyzed
Published
2026-10-06
Last modified
2026-10-09
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-778

Description

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.

Affected configurations

• apache log4net (>= 1.2.9 < 3.5.0)

Related

Weakness · CWE (1)

  • CWE-778 Insufficient Logging weakness

References