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use-cases/deep-security-scan.md 2026-06-17 17:02 UTC to 2026-06-18 23:01 UTC

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name: Run a deep security scan tagline: Search an authorized repository deeply for plausible vulnerabilities. summary: Use the Codex Security plugin to run a more comprehensive audit of a repository or scoped folder that repeats discovery, validates candidates, and produces reviewable coverage and findings. skills:

  • token: $codex-security:deep-security-scan url: /codex/security/plugin/deep-scans description: Run repeated discovery passes over a repository or scoped folder, validate surviving findings, analyze attack paths, and generate reviewable artifacts. bestFor:

  • Application security reviews of a repository or component that you own or are authorized to assess.

  • More comprehensive reviews where additional runtime and token use are appropriate for finding more candidate issues.

  • Security teams that need traceable finding evidence before deciding what to remediate. starterPrompt: title: Run a Deep Security Scan body: >- Use $codex-security:deep-security-scan to run a deep security scan on [this repository / absolute path to a scoped folder].

    Scope and rules:

    • I am authorized to assess this repository.

    • Keep the scan within [the entire repository / the exact folder named above].

    • Use the Codex Security plugin's deep-scan workflow; do not reinterpret this as a pull request or diff review.

    Return the generated report path. Summarize the findings, reviewed surfaces, and proof gaps that require human review first. suggestedEffort: high relatedLinks:

  • label: Deep-scan guide url: /codex/security/plugin/deep-scans

  • label: Agent approvals and security url: /codex/agent-approvals-security

  • label: Codex cyber safety url: /codex/concepts/cyber-safety

Choose a deep repository review

Use a deep scan when you need a more comprehensive vulnerability review across a repository or explicit folder and can budget for a longer run. The Codex Security plugin repeats discovery passes before validating and prioritizing findings, so this workflow takes more time and resources than an ordinary scan.

A deep scan can review an entire repository or one explicitly named package or directory. To review a pull request, commit, branch diff, or working-tree patch, use $codex-security:security-diff-scan.

Prepare an authorized scan

  1. Open the repository in Codex and complete the Codex Security plugin quickstart.
  2. Confirm that you own the repository or have authorization to assess it.
  3. Add repository-specific architecture, trust-boundary, build, test, and validation guidance in AGENTS.md when it will improve the review.
  4. Run the starter prompt and let the scan complete its repeated discovery, validation, attack-path analysis, and final reporting stages.
  5. Review the findings workspace and any proof gaps before asking Codex to change code or reproduce a finding further.

Review evidence before remediation

The final result should identify affected locations, why the behavior is reachable, what validation Codex performed, any remaining proof gaps, and a bounded remediation direction. Distinguish findings without validation evidence from validated findings.

Start remediation only for a finding you have selected and reviewed. Use Remediate a vulnerability backlog to fix findings one at a time with focused regression validation.

For setup, preflight, scoped targets, and runtime expectations, see Run a deep security scan.