org.apache.logging.log4j/log4j-core: Apache Log4j Core: Invalid XML output causes denial of service in logging

A flaw was found in Apache Log4j Core. The XmlLayout component, responsible for formatting log messages into XML, does not properly remove or replace characters that are not allowed in XML 1.0. When log messages or diagnostic information contain these forbidden characters, the resulting XML outpu...

Security Bulletin: IBM App Connect for Manufacturing is vulnerable to multiple vulnerabilities due to Apache Log4j and Bouncy Castle.

Summary IBM App Connect for Manufacturing is vulnerable to multiple vulnerabilities due to Apache Log4j and Bouncy Castle. Vulnerability Details CVEID:CVE-2026-34477 DESCRIPTION: The fix for CVE-2025-68161 https://logging.apache.org/security.htmlCVE-2025-68161 was incomplete: it addressed hostnam...

Improper Certificate Validation

Apache Log4j Core is vulnerable to Improper Certificate Validation. The vulnerability is due to ignored hostname verification settings in TLS configuration, which allows an attacker to perform a man-in-the-middle attack by presenting a trusted certificate and intercepting secure communications...

CVE-2026-34480

A flaw was found in Apache Log4j Core. The XmlLayout component, responsible for formatting log messages into XML, does not properly remove or replace characters that are not allowed in XML 1.0. When log messages or diagnostic information contain these forbidden characters, the resulting XML outpu...