CVE-2026-44632: Yamcs Vulnerable to Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory`

May 27, 2026

A Server-Side Code Injection vulnerability exists in the Yamcs algorithm evaluation engine (org.yamcs.algorithms.JavaExprAlgorithmExecutionFactory). The application dynamically compiles and evaluates user-controlled algorithm text without enforcing a secure sandbox. An authenticated user with the ChangeMissionDatabase privilege can exploit this to achieve Remote Code Execution (RCE) on the underlying host operating system via the Janino compiler.

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Code Behaviors & Features

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