Yamcs vulnerable to authenticated remote code execution via unescaped StreamSQL `LIKE` pattern compiled by Janino (`LikeExpression`)

Summary Yamcs compiles StreamSQL query expressions to Java at runtime with Janino. The LIKE operator inserts the user-supplied pattern into the generated Java unescaped, inside a "..." literal, so a pattern containing " breaks out and injects arbitrary Java e.g. a static block that runs an OS...

CVE-2026-55565

Yamcs (mission control framework) is vulnerable to authenticated remote code execution in LikeExpression.fillCode_getValueReturn, where an unescaped StreamSQL LIKE pattern is injected into Java source compiled at runtime by Janino (SimpleCompiler.cook). A " in the pattern breaks out of the genera...

CVE-2026-55565 Yamcs: Authenticated remote code execution via unescaped StreamSQL `LIKE` pattern compiled by Janino (`LikeExpression`)

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs LikeExpression.fillCodegetValueReturn in yamcs-core/src/main/java/org/yamcs/yarch/streamsql/LikeExpression.java inserts an unescaped LIKE pattern into Java source compiled by Expression.getCompiledExpression through...

java-stager

java-stager Ein PoC Java-Stager, der eine Java-Datei herunterladen, kompilieren und im Speicher ausführen kann. Dies dient nur zu Forschungszwecken, verwenden Sie es nicht an Orten, an denen Sie nicht autorisiert sind. Was ist das? Dies basiert auf der Arbeit von James Williams aus seinem Vortrag...