--- title: Top Security & Auditing Skills slug: security-auditing type: primary-category canonical: https://top-agent-skills.com/top-skills-for-security-auditing skills: 12 rubric: 1.0 updated: 2026-08-18 --- # Top Security & Auditing Skills **agent-email-inbox** is the top-ranked security Skill at 59/100: Give an agent a webhook-driven inbox with the sender-allowlist and content-filtering patterns that block prompt injection from inbound email. Static analysis, vulnerability scanning, k8s hardening, audit workflows, pentest tooling. 12 Skills indexed, ranked by a published composite score (https://top-agent-skills.com/about/methodology). Content last changed 2026-08-18. ## The ranking ### 1. agent-email-inbox — score 59/100 (verified-org) Give an agent a webhook-driven inbox with the sender-allowlist and content-filtering patterns that block prompt injection from inbound email. - Best for: Letting an agent receive and act on email safely — support triage, email-to-task pipelines, automated replies with content-safety guards. - Not ideal for: Outbound-only sending — use the resend skill; this one is about securely processing inbound mail. - Publisher: Resend · MIT - Verified on: claude-code, cursor, codex ```bash npx skills add resend/resend-skills ``` Full entry: https://top-agent-skills.com/skill/agent-email-inbox (https://top-agent-skills.com/skill/agent-email-inbox.md) ### 2. semgrep — score 52/100 (verified-org) Semgrep's own scanning skill: run the industry-standard SAST engine across 30+ languages, and author custom rules for your codebase's patterns. - Best for: Pattern-based vulnerability scanning across a polyglot codebase, and writing custom YAML rules to enforce a house convention the linter cannot express. - Not ideal for: Teams that need a permissive licence. This ships under the Semgrep Rules License v1.0, not MIT or Apache — read it before vendoring the rules into a commercial product. - Publisher: Semgrep · Semgrep Rules License v1.0 - Verified on: claude-code ```bash npx skills add semgrep/skills ``` Full entry: https://top-agent-skills.com/skill/semgrep-scan (https://top-agent-skills.com/skill/semgrep-scan.md) ### 3. code-security — score 52/100 (verified-org) A vendor-maintained rule corpus for secure code review — one reference file per vulnerability class, from SQL injection to Terraform misconfiguration. - Best for: Secure-code review with real depth behind each finding: the skill ships separate references for SQL injection, XSS, SSRF, XXE, CSRF, secrets, regex DoS, memory safety, Docker, Kubernetes, and Terraform on AWS and GCP. - Not ideal for: Running an actual scan — this is guidance, not a scanner. Pair it with the semgrep skill when you need findings rather than review standards. - Publisher: Semgrep · Semgrep Rules License v1.0 - Verified on: claude-code ```bash npx skills add semgrep/skills ``` Full entry: https://top-agent-skills.com/skill/semgrep-code-security (https://top-agent-skills.com/skill/semgrep-code-security.md) ### 4. scan-secrets — score 50/100 (verified-org) GitGuardian's own secret-detection skill — scans history, images and packages, and ships a written remediation doctrine rather than just a list of hits. - Best for: Catching a credential before it reaches a remote, and knowing what to do about one already committed — the bundled doctrine covers rotation triggers and history rewriting, not just detection. - Not ideal for: Zero-setup use. It requires the ggshield CLI and an authenticated GitGuardian account, and the skill explicitly forbids substituting the GitGuardian MCP scan tool for the CLI. - Publisher: GitGuardian · MIT - Verified on: claude-code, codex ```bash /plugin marketplace add GitGuardian/agent-skills ``` Full entry: https://top-agent-skills.com/skill/gitguardian-secret-scanning (https://top-agent-skills.com/skill/gitguardian-secret-scanning.md) ### 5. trail-of-bits — score 49/100 (verified-org) Security audits run by a real security firm. CodeQL + Semgrep + audit workflows. - Best for: Pre-release vulnerability scans, ongoing security review. - Publisher: Trail of Bits · Apache-2.0 - Verified on: claude-code, cursor, codex ```bash npx skills add trailofbits/skills ``` Full entry: https://top-agent-skills.com/skill/trail-of-bits (https://top-agent-skills.com/skill/trail-of-bits.md) ### 6. code-review-security — score 49/100 (verified-org) OWASP-published review, SCA, secrets and threat-modelling skills — the most citable provenance available for security review vocabulary. Full entry: https://top-agent-skills.com/skill/owasp-security-skills (https://top-agent-skills.com/skill/owasp-security-skills.md) ### 7. shannon — score 48/100 (verified-org) Real exploits, no false positives. 96.15% exploit success across 50+ vuln types. Full entry: https://top-agent-skills.com/skill/shannon (https://top-agent-skills.com/skill/shannon.md) ### 8. snyk-fix — score 48/100 (verified-org) The remediation half of security work: scan, fix, validate the fix, open the PR. Batch mode handles a whole backlog of CVEs in one pass. Full entry: https://top-agent-skills.com/skill/snyk-fix (https://top-agent-skills.com/skill/snyk-fix.md) ### 9. security-review — score 48/100 (official-anthropic) Pre-merge security sweep on the current branch's diff. Full entry: https://top-agent-skills.com/skill/security-review (https://top-agent-skills.com/skill/security-review.md) ### 10. code-review-plugin — score 45/100 (official-anthropic) Structured PR reviews with severity-tagged findings — bugs, security, perf, style. Full entry: https://top-agent-skills.com/skill/code-review-plugin (https://top-agent-skills.com/skill/code-review-plugin.md) ### 11. k8s-security-policies — score 40/100 (community) Kubernetes hardening by the book. NetworkPolicies, RBAC, OPA, service mesh. Full entry: https://top-agent-skills.com/skill/k8s-security-policies (https://top-agent-skills.com/skill/k8s-security-policies.md) ### 12. ffuf-web-fuzzing — score 36/100 (community) ffuf web fuzzing for authorized pentests. Common modes, payloads, and gotchas. Full entry: https://top-agent-skills.com/skill/ffuf-web-fuzzing (https://top-agent-skills.com/skill/ffuf-web-fuzzing.md) ## About this category The best agent skills for security and auditing in 2026 pair Claude Code's built-in security-review Skill with scanner-backed MCP servers — Snyk, GitHub Advanced Security, AWS — giving the agent live vulnerability data alongside static analysis that catches injection patterns, auth bypass, race conditions, and the OWASP Top 10. Security & auditing Skills equip agents to find the vulnerabilities a human reviewer would miss in a hurried scan — and just as importantly, to document and triage them clearly. The category covers static analysis, dependency vulnerability scanning, Kubernetes hardening, IaC misconfiguration audits, secret-scanning, threat modeling, pentest tooling, and the security-review Skill that runs a structured pre-merge sweep on the current diff. Common workflows include screening a PR for injection patterns, scanning a new repo for hardcoded credentials, generating a STRIDE threat model from an architecture diagram, hardening a Helm chart, auditing IAM policies for excessive permissions, and producing a findings report with severity ratings. Several Skills here pair with MCP servers — Snyk for SAST, GitHub Advanced Security for secret-scanning, AWS for IAM audits — so the agent has live access to scanner results, not just static rule lists. Security engineers, platform teams, and CTOs at fast-shipping startups use these. Composite scoring weights provenance (Trail of Bits, GitHub Security Lab, recognized security orgs) heavily, plus install count from production teams. We do not rank tools intended for offensive use outside authorized contexts. ## Common questions **What does the security-review Skill check for?** Injection (SQL, command, XSS), auth bypass, race conditions, missing input validation, hardcoded secrets, insecure deserialization, SSRF, and the OWASP Top 10. It runs on the current branch's diff. **Are these Skills safe for offensive security work?** We rank Skills for defensive security, authorized pentesting, CTF, and security research. Skills focused on destructive techniques, DoS, mass targeting or detection evasion are not listed. **Do I need an MCP server for security Skills?** Some pair with Snyk, GitHub Advanced Security, AWS, or PagerDuty MCP servers for live data. Pure rule-based scanners run standalone inside the agent. **How do these Skills handle false positives?** The best Skills require a justification before flagging — they explain why a pattern matched and what the exploit would look like. This keeps the noise floor low enough to act on findings. **Can a Skill replace a real security audit?** No. It is a first pass that catches mechanical issues — the same things a senior engineer would catch with hours of careful reading. Real audits cover architecture, key management, and business logic that no Skill can model. --- _Top Agent Skills. Machine-readable twin of https://top-agent-skills.com/top-skills-for-security-auditing._ _JSON: https://top-agent-skills.com/top-skills-for-security-auditing.json · whole catalog: https://top-agent-skills.com/skills.json (CC BY 4.0)_