DEBIAN-CVE-2026-105241

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Source

https://security-tracker.debian.org/tracker/CVE-2026-105241

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-105241.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-105241

Upstream

CVE-2026-105241

Published

2026-10-06T20:17:15Z

Modified

2026-10-08T09:47:32Z

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 Handling of Unicode Encoding vulnerability in the SmtpPickupDirAppender of Apache log4net. Content that the mail file writer cannot encode, such as an unpaired UTF-16 surrogate, made the write throw. Every buffered event in the batch was discarded, not only the one carrying the content, and a truncated mail could be left in the pickup directory. A party whose data reaches a log message could suppress the records of other events. Only applications that use SmtpPickupDirAppender 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-2026-105241

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-2026-105241.json"

Debian:14 / log4net