vulnhunter

90 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By sendaifun/skills (GitHub) · coding · 129 stars · scanned at commit 06b36b8

Security vulnerability detection and variant analysis skill. Use when hunting for dangerous APIs, footgun patterns, error-prone configurations, and vulnerability variants across codebases. Combines sharp edges detection with variant hunting methodology.

Works with any agent that supports SKILL.md skills.

What this skill can do

Runs commands on your computer

The author does not mention this. Expected for a coding skill.

Found in 8 places.

skills/vulnhunter/SKILL.md, line 88os.system(), subprocess with shell=True
skills/vulnhunter/SKILL.md, line 174grep -rn "execute.*%s" --include="*.py"
skills/vulnhunter/SKILL.md, line 181grep -rn "os.system\|subprocess.*shell=True" --include="*.py"

Show 5 more

skills/vulnhunter/resources/sharp-edges-catalog.md, line 142os.system(f"ping {user_input}")
skills/vulnhunter/resources/sharp-edges-catalog.md, line 143subprocess.call(f"convert {filename}", shell=True)
skills/vulnhunter/resources/sharp-edges-catalog.md, line 146subprocess.run(["ping", "-c", "4", validated_host], shell=False)
skills/vulnhunter/resources/variant-patterns.md, line 84os.system(f"ping {user_host}")
skills/vulnhunter/resources/variant-patterns.md, line 352| Command Injection | `os.system()` | `exec()` | `exec.Command()` | `Command::new()` |

Connects to the internet

The author does not mention this.

Found in 2 places.

skills/vulnhunter/resources/variant-patterns.md, line 152requests.get(user_url)
skills/vulnhunter/resources/variant-patterns.md, line 166r'aiohttp.*session\.(get|post)'

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'vulnhunter' ] || [ -L ~/.agents/skills/'vulnhunter' ]; then echo 'A skill folder named vulnhunter already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/sendaifun/skills' "$d" && git -C "$d" checkout --quiet '06b36b8b420e705ffd57b29e463f01093959d8d4' -- 'skills/vulnhunter' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/vulnhunter' ~/.agents/skills/'vulnhunter' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'vulnhunter' ~/.claude/skills/'vulnhunter' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-07	`06b36b8`	100