CVE-2026-105239
MEDIUM
5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: none
Description
AI Translation Available
Improper Neutralization of Null Byte or NUL Character vulnerability in the EventLogAppender of Apache log4net.
A NUL character in logged content ended the Windows Event Log record at that point, so everything the layout rendered after it, including exception text and trailing fields, was silently not stored. A party whose data reaches a log message could hide the rest of that record. 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.
158
Improper Neutralization of Null Byte or NUL Character
IncompleteCommon Consequences
Security Scopes Affected:
Integrity
Potential Impacts:
Unexpected State
Applicable Platforms
Languages:
Not Language-Specific, C, C++
https://github.com/apache/logging-log4net/commit/dc5855a0720c91590fd7a81d729ea0…
https://github.com/apache/logging-log4net/pull/315
https://lists.apache.org/thread.html/9fx1qo5hc0tg8ym0t6p9gt1zpb2qlxpq