CVE-2026-40021

A flaw was found in Apache Log4net. An attacker who can influence specific data fields within log messages can exploit this vulnerability. By injecting characters forbidden by the XML 1.0 specification, the attacker can cause an exception during log serialization, leading to the silent loss of lo...

Apache Log4cxx Cross-Site Scripting Vulnerability

Apache Log4cxx is the United States Apache Apache Foundation of a C + + logging framework patterned on Apache log4j . A cross-site scripting vulnerability exists in Apache Log4cxx versions prior to 1.5.0, which stems from HTMLLayout not properly escaping logger names, and can be exploited by an...