Will It Vibe?Runtime.exec / ProcessBuilder built from a variable (Java)
Part of Security, which counts for 30% of the overall score. When this check fires it deducts 8 points from that category, once per scan, no matter how many places it turns up.
What it detects
Runtime.getRuntime().exec or new ProcessBuilder concatenates a value into the command with +, which is a command injection risk when the value is user-controlled.
Why it matters
Concatenating a value into Runtime.getRuntime().exec or new ProcessBuilder builds a command from text. Depending on how it is split, a crafted value can add arguments or, on the single-string exec form, inject commands. This is a heuristic because concatenating a constant is safe but matches the same shape.
How to fix it
Use the ProcessBuilder(List<String>) or exec(String[]) form and pass each argument as a separate array element, so arguments stay separate from the program. Do not build a single command string. Validate dynamic arguments against an allowlist where appropriate.
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