Last Updated: 2026-08-26T17:05:28Z (UTC) What’s Happening A currently unconfirmed vulnerability in Apache Log4j could allow remote code execution (RCE) by bypassing the allowlist enforced by FilteredObjectInputStream (FOIS) during Java deserialization. Exploitation requires an uncommon configuration in which an application or logging service accepts serialized Log4j LogEvent objects through an FOIS-based receiver, as well as a suitable deserialization gadget on the target classpath. Unlik...