CVE-2026-105243
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Apache log4net: Oversize EventLogAppender record silently discarded
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Apache log4net
- Vendor
- Apache Software Foundation
- Product
- Apache log4net
- Platforms
- Unknown
- Default status
unaffected- Package
- log4net
- Package collection
- https://nuget.org/packages
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1.2.9 | affected | semver | 3.5.0 | Unavailable | None listed |
Apache log4net
- Vendor
- Apache Software Foundation
- Product
- Apache log4net
- Platforms
- Unknown
- Default status
unaffected- Package
- log4net
- Package collection
- https://nuget.org/packages
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 02e1e115435888485f2e28b414d267e39e799e07 | affected | git | 28fbfb25678c48a8cc5bc9b94ead0dddfc39ffed | Unavailable | None listed |