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Fail Open, Game Over: Turning a One-LineTomcat Fix into Unauthenticated RCE

Fail Open, Game Over: Turning a One-LineTomcat Fix into Unauthenticated RCE

April 14, 2026
by oxfemale Apache TomcatDeserializationJavaRCE

A flaw in Apache Tomcat Tribes clustering allows attackers to send crafted cluster messages that bypass authentication and trigger unsafe deserialization, leading to unauthenticated remote code execution on exposed servers.

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