CVE-2026-44632
Critical · 9.1Yamcs Vulnerable to Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory`
CVSS
9.1
EPSS
1.1%
Published
May 27, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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