CVE-2026-105243: apache log4net

csirt@kutim:~/threat-intel/cve/CVE-2026-105243

CVSS 5.3 · Medium EPSS 0,81%

Kerentanan Insufficient Logging pada apache log4net. Skor CVSS 3.1 5.3 (Medium) menurut apache.org.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD: 6 Oktober 2026
Terakhir diubah: 9 Oktober 2026
Status NVD: Analyzed
CVSS 3.1: 5.3 (Medium), sumber apache.org
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-778: Insufficient Logging
EPSS (30 hari): 0,81% peluang dieksploitasi; lebih tinggi dari 55,6% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
apache	log4net	Versi 1.2.9 hingga sebelum 3.5.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://lists.apache.org/thread.html/jr6fj5skv1vnjbc9jmt8bp151p8ow1rp mailing list · advisory vendor
https://github.com/apache/logging-log4net/commit/28fbfb25678c48a8cc5bc9b94ead0dddfc39ffed patch
https://github.com/apache/logging-log4net/pull/315 patch
http://www.openwall.com/lists/oss-security/2026/10/07/17 mailing list · advisory pihak ketiga

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 10 Okt 2026, 06:25 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.