audit-security

audit-security is a skill for Claude Code, Codex from kensaurus/cursor-kenji. It costs 74 tokens per session (2,663 once invoked), scanned A, original, MIT.

A static security review of application code for common web risks, including injection, unsafe headers, vulnerable dependencies, and exposed secrets.

In plain words
What is it for?
Use it to review code for OWASP-style vulnerabilities, dependency risks, secrets, and unsafe handling of queries, HTML, or object identifiers.
Why use it?
It helps find security weaknesses before attackers exploit untrusted input, access controls, or outdated packages. It does not create exploit examples.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/kensaurus/cursor-kenji/audit-security
Any agent
npx skills add kensaurus/cursor-kenji --skill audit-security
Clone the repo
git clone --depth 1 https://github.com/kensaurus/cursor-kenji

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for audit-security

README.md
[![agentmods](https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/audit-security.svg)](https://agentmods.dev/skills/kensaurus/cursor-kenji/audit-security)
Your own site
<a href="https://agentmods.dev/skills/kensaurus/cursor-kenji/audit-security"><img src="https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/audit-security.svg" alt="Measured on agentmods" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,663 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00074 $0.02663
Opus 5 $0.00037 $0.01332
Sonnet 5 $0.00015 $0.00533
Haiku 4.5 $0.00007 $0.00266

Measured 2d ago against content hash eaeeff487d0a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

audit-security scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/audit-security/SKILL.md · 339 lines

How it starts

The opening of the file, as written. The whole thing — 339 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Audit Skill

Degree of freedom: MIXED — Steps 0–4 judgment [HIGH freedom]; dependency and secret scans [LOW freedom — run exactly]. Never write exploit PoCs.

Audit-and-fix exception. May fix inline. Plan-only burndown → plan-security-audit.

OWASP static review (injection, headers, deps). Session / route×gate / getSession()audit-auth-flows. Next.js 16: grep middleware.ts and proxy.ts (the Aug-2026 security line included a proxy-bypass class).

How to reason

  1. Observe — quote the sink or missing check (file:line)
  2. Interpret — can untrusted input reach a query, HTML, or object-id?
  3. Classify — injection / IDOR / secret / header / dep-CVE / hand-off
  4. Severity — exploitable data access or hardcoded secret = Critical

Worked example

Observe: GET /documents/:id loads by id only (api/docs/route.ts:18). Interpret: any caller who can hit the route reads another user's doc. Classify: IDOR. Severity: Critical. Finding: IDOR | /documents/:id | add userId predicate. Matcher / getSession() on that route → audit-auth-flows, not this checklist.

Step 0: Understand the Project [HIGH freedom]

Before auditing, discover the tech stack and attack surface:

  1. Read package.json / requirements.txt / go.mod to identify:
  • Auth library (next-auth, passport, supabase-auth, django-auth, etc.)
  • Database ORM (Prisma, Sequelize, SQLAlchemy, etc.)
  • HTTP framework (Express, Fastify, Django, Flask, etc.)
  • Any security-specific packages (helmet, cors, csurf, rate-limit, etc.)
  1. Identify the auth pattern:
  • Session-based vs JWT vs OAuth
  • Where tokens are stored (cookies, localStorage, headers)
  • How permissions/roles are enforced
  1. Identify the data flow:
  • Where user input enters the system
  • How data is validated and sanitized
  • How data reaches the database

Step 1: Research Current Threats [HIGH freedom]

Fetch current OWASP and security best practices for the detected stack:

Read the full file on GitHub · 339 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 339 lines · 74 tokens per session scan A eaeeff487d0a

Subscribe to this mod's changes

audit-security is a skill published in the GitHub repository kensaurus/cursor-kenji (9 stars, last pushed 7d ago), licensed MIT. It adds 74 tokens to every session and 2,663 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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