CVEvulnerability

CVE-2026-105240

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-158

Description

Improper Neutralization of Null Byte or NUL Character vulnerability in the OutputDebugStringAppender of Apache log4net. A NUL character in logged content ended the debug output record at that point, so everything the layout rendered after it, including exception text and trailing fields, was silently lost. A party whose data reaches a log message could hide the rest of that record. Only applications on Windows that use OutputDebugStringAppender 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-158 Improper Neutralization of Null Byte or NUL Character weakness

References