Security Bulletin: Vulnerability affect underscore-umd-min, werkzeug-3.1.5, flask-3.1.1, cryptography, aircompressor, pyasn1, http, log4j, apache2-build, commons-configuration, bcpkix-jdk18on, server-MariaDB, Jline, IBM COS Systems (April 2026)

Summary Vulnerability with underscore-umd-min CVE-2026-27601, werkzeug-3.1.5 CVE-2026-27199, flask-3.1.1-py3-nCVE-2026-27205, cryptographyCVE-2026-26007, aircompressorCVE-2025-67721, pyasn1CVE-2026-23490, http, log4jCVE-2025-68161, apache2-buildCVE-2025-55753, commons-configurationCVE-2024-29131,...

Unity Linux 20.1070e Security Update: wildfly-build-tools (UTSA-2026-016705)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016705 advisory. Apache Log4j2 versions 2.0-alpha1 through 2.16.0 excluding 2.12.3 and 2.3.1 did not protect from uncontrolled recursion from self-referential lookups. This allows an...

Year in Review: Vulnerabilities old and new and something React2

Speed and age shouldn't be allowed to pair up, but that is the theme of the Talos 2025 Year in Review vulnerability findings. Figure 1. React/React2Shell 2025 at the top, with PHPUnit 2017 and Log4j 2021 following up. The year was characterized by an unending beat-down on infrastructure that reli...

log4j-poc-application

./setup.sh 2. docker compose up -d 3. Terminal2 cd...

log4j1-socketappender: DoS via hashmap logging

A flaw was found in Chainsaw and SocketAppender components with Log4j 1.x on JRE, less than 1.7. This issue may allow an attacker to use a logging entry with a specially-crafted hashmap or hashtable, depending on which logging component is in use, to process and exhaust the available memory in th...

log4j: Unsafe deserialization flaw in Chainsaw log viewer

A flaw was found in the log4j 1.x chainsaw component, where the contents of certain log entries are deserialized and possibly permit code execution. This flaw allows an attacker to send a malicious request with serialized data to the server to be deserialized when the chainsaw component is run...

log4j: Unsafe deserialization flaw in Chainsaw log viewer

A flaw was found in the log4j 1.x chainsaw component, where the contents of certain log entries are deserialized and possibly permit code execution. This flaw allows an attacker to send a malicious request with serialized data to the server to be deserialized when the chainsaw component is run...

log4j: SQL injection in Log4j 1.x when application is configured to use JDBCAppender

A flaw was found in the Java logging library Apache Log4j in version 1.x. JDBCAppender in Log4j 1.x is vulnerable to SQL injection in untrusted data. This allows a remote attacker to run SQL statements in the database if the deployed application is configured to use JDBCAppender with certain...

log4j: Remote code execution in Log4j 1.x when application is configured to use JMSSink

A flaw was found in the Java logging library Apache Log4j in version 1.x. JMSSink in Log4j 1.x is vulnerable to deserialization of untrusted data. This allows a remote attacker to execute code on the server if JMSSink is deployed and has been configured to perform JNDI requests...

log4j: Unsafe deserialization flaw in Chainsaw log viewer

A flaw was found in the log4j 1.x chainsaw component, where the contents of certain log entries are deserialized and possibly permit code execution. This flaw allows an attacker to send a malicious request with serialized data to the server to be deserialized when the chainsaw component is run...

CVE-2022-23307

CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 Chainsaw was a component of Apache Log4j 1.2.x where the same issue exists...

USN-5192-1 apache-log4j2 vulnerability

Chen Zhaojun discovered that Apache Log4j 2 allows remote attackers to run programs via a special crafted input. An attacker could use this vulnerability to cause a denial of service or possibly execute arbitrary code. Please see the following link for more information:...