DEBIAN-CVE-2026-105243

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Source

https://security-tracker.debian.org/tracker/CVE-2026-105243

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-105243.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-105243

Upstream

CVE-2026-105243

Published

2026-10-06T20:17:16Z

Modified

2026-10-08T09:47:33Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator

Summary

[none]

Details

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.

References

https://security-tracker.debian.org/tracker/CVE-2026-105243

Affected packages

Debian:13 / log4net

Package

Name: log4net
Purl: pkg:deb/debian/log4net?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.2.10+dfsg-9

1.2.10+dfsg-10

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-105243.json"

Debian:14 / log4net