CVE-2026-105242: apache log4net

csirt@kutim:~/threat-intel/cve/CVE-2026-105242

CVSS 5.3 · Medium EPSS 0,82%

Kerentanan Improper Handling of Exceptional Conditions pada apache log4net. Skor CVSS 3.1 5.3 (Medium) menurut apache.org.

Deskripsi (NVD)

Improper Handling of Exceptional Conditions vulnerability in the aspnet-request pattern converter of Apache log4net. Reading request parameters triggers ASP.NET request validation, so a request carrying content such as markup made the layout throw and the appender discarded the whole event. A sender could suppress the log record of their own request. Only applications on ASP.NET for .NET Framework whose layout uses %aspnet-request are affected. This issue affects Apache log4net: from 1.2.11 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-755: Improper Handling of Exceptional Conditions
EPSS (30 hari): 0,82% peluang dieksploitasi; lebih tinggi dari 56,2% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
apache	log4net	Versi 1.2.11 hingga sebelum 3.5.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://lists.apache.org/thread.html/zg6dbqm4ztm7j3c21nfsqj0yxm5yrpdx mailing list · advisory vendor
https://github.com/apache/logging-log4net/commit/145203420c579a703008b4b723b6a080757f4964 patch
https://github.com/apache/logging-log4net/pull/316 patch
http://www.openwall.com/lists/oss-security/2026/10/07/16 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.