Individual skill

detecting-command-injection-patterns

Scan a source tree for command-injection vulnerable patterns: shell=True calls in Python subprocess, os.system / os.popen with interpolated strings, Node child_process.exec with template literals, Ruby backticks / Kernel#system / Kernel#exec with interpolation, Go exec.Command with shell wrapping, PHP system / passthru / shell_exec / backticks with $-interpolation, Java Runtime.exec with concatenated args. Use when: pre-commit gate on code that calls out to shell utilities, audit of file-processing / archive-handling / image-conversion code, post-bug-report investigation for "we shell out to a tool." Threshold: any shell-invocation API called with a string that contains a variable interpolation, OR shell=True with anything other than a fixed literal. Trigger with: "scan command injection", "shell=True audit", "find exec calls", "check os.system".

skills/.curated/detecting-command-injection-patterns/SKILL.md

Source commit 0500b275e963c027f6b410e8c49c0446945c574e

What was checked

Matches the observed repository HEAD

Yes

Scanner rules are current

No

Repository scan complete

No

Skill scan complete

No

Observed behavior

Not checked yet

Last checked

Nov 12, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

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