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CVE-2026-105240

Apache log4net: NUL character truncates OutputDebugStringAppender records PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Apache Software Foundation / Apache log4netaffected 1.2.9 before 3.5.0
Apache Software Foundation / Apache log4netaffected 02e1e115435888485f2e28b414d267e39e799e07 before 6046fe9d7f353b49fe995361c071ec2eea8f7ef6

CWE

CWE-158

References

ADP enrichment

CVE

No English description supplied.

CISA-ADP

No English description supplied.

No references supplied.