CVE-2026-105244

Katalog CVE

CVSS 5.3 · Medium EPSS 0,82%

Kerentanan Improper Encoding or Escaping of Output pada apache log4net. Skor CVSS 3.1 5.3 (Medium) menurut apache.org.

Deskripsi (NVD)

Improper Encoding or Escaping of Output vulnerability in the RemoteSyslogAppender of Apache log4net. Every character outside visible ASCII and space was removed from the record instead of being escaped, so non-ASCII text and control characters such as tabs disappeared without notice. A party whose data reaches a log message could make a distinct value look identical in the record, for example a user name holding a zero-width space logged as admin. Only applications that use RemoteSyslogAppender are affected. This issue affects Apache log4net: from 1.2.12 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-116: Improper Encoding or Escaping of Output

EPSS (30 hari)

0,82% peluang dieksploitasi; lebih tinggi dari 56,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/apache/logging-log4net/pull/315 patch · advisory vendor
• https://lists.apache.org/thread.html/q7649hhdodthoqw8jsjgtnb4m8qfy6d6 mailing list · advisory vendor
• https://github.com/apache/logging-log4net/commit/77717061b20d4346b6c0ce6b54643d85fb348bc7 patch
• http://www.openwall.com/lists/oss-security/2026/10/07/19 mailing list · advisory pihak ketiga