DEBIAN-CVE-2026-105239

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Source

https://security-tracker.debian.org/tracker/CVE-2026-105239

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-105239.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-105239

Upstream

CVE-2026-105239

Published

2026-10-06T20:17:15Z

Modified

2026-10-08T09:47:38Z

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

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.

References

https://security-tracker.debian.org/tracker/CVE-2026-105239

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-2026-105239.json"

Debian:14 / log4net