Logback Core
Monthly
Arbitrary code execution in QOS.CH logback-core versions up to and including 1.5.34 allows a local attacker with existing privilege to run code in the context of any Java application that loads Logback when the Janino library is on the classpath. The flaw circumvents prior hardening for CVE-2025-11226 via conditional configuration file processing, and is triggered either by writing to an existing logback configuration file or by injecting an environment variable that points the process at a malicious configuration. No public exploit identified at time of analysis, though the bypass nature of the issue makes weaponization of existing CVE-2025-11226 exploit code plausible.
Arbitrary code execution in QOS.CH logback-core versions up to and including 1.5.34 allows a local attacker with existing privilege to run code in the context of any Java application that loads Logback when the Janino library is on the classpath. The flaw circumvents prior hardening for CVE-2025-11226 via conditional configuration file processing, and is triggered either by writing to an existing logback configuration file or by injecting an environment variable that points the process at a malicious configuration. No public exploit identified at time of analysis, though the bypass nature of the issue makes weaponization of existing CVE-2025-11226 exploit code plausible.