Scan your codebase for vulnerabilities changedclaude-security
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14 Aug 2026
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1313To run the plugin, you need:
1414
1515* A paid plan, for the [dynamic workflows](/docs/en/workflows) the scan uses to orchestrate its agents. On Pro, turn them on from the Dynamic workflows row in `/config`.
16* Python 3.9.6 or later available on your `PATH` as `python3`. Check with `python3 --version`. The plugin's tooling uses only the Python standard library, so nothing is installed.
16* Python 3.9 or later available on your `PATH` as `python3`. Check with `python3 --version`. The plugin's tooling uses only the Python standard library, so nothing is installed.
1717* Linux, macOS, or Windows.
1818* Git, for change scans and for turning findings into patches; those jobs don't support other version control systems. A full scan works in any directory, with or without version control.
1919
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2525/plugin install claude-security@claude-plugins-official
2626```
2727
28The command opens the plugin's details, where you choose an [installation scope](/docs/en/discover-plugins#install-plugins) to start the install.
29
2830If the install fails, the fix depends on which message Claude Code reports:
2931
3032* If it reports `Marketplace "claude-plugins-official" not found`, add the marketplace with `/plugin marketplace add anthropics/claude-plugins-official`, then retry the install.
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130132
131133## Troubleshooting
132134
133**The `/claude-security` menu opens with a Python warning.** The plugin needs `python3` 3.9.6 or later on your `PATH`. When it can't find `python3` at all, the menu warns that Claude Security won't work until one is installed; when the first `python3` on your `PATH` is older, the warning names the version it found. Install Python 3, or put a newer `python3` first on your `PATH`, then start a new session.
135**The `/claude-security` menu opens with a Python warning.** The plugin needs `python3` 3.9 or later on your `PATH`. When it can't find `python3` at all, the menu warns that Claude Security won't work until one is installed; when the first `python3` on your `PATH` is older, the warning names the version it found. Install Python 3, or put a newer `python3` first on your `PATH`, then start a new session.
134136
135137**You may see "Fable 5's safeguards flagged this message" when using Fable 5.** Due to Fable 5's cybersecurity safety classifiers, certain model activities will be blocked and automatically downgraded to Opus. This is expected, and the scan should still complete successfully.
136138
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