Claude Skills by ByamB4

Mine GitHub Security Advisories and CVE databases for incomplete fixes, finding variant vulnerabilities in patched code or similar patterns in related packages.

Detect authentication and authorization bypass vulnerabilities including missing auth middleware, JWT algorithm confusion, IDOR, and session fixation.

Detect code injection vulnerabilities in packages that dynamically generate or evaluate code via new Function(), eval(), vm.run*, or template literal interpolation.

Detect OS command injection via shell execution sinks where user-controlled input reaches system commands without proper sanitization.

Cross-pollination multiplier technique: find a vulnerability in one package, then search for the same pattern across all similar packages to multiply findings.

Detect decompression bomb vulnerabilities where compressed input can expand to exhaust memory, targeting buffer-based decompression without size limits.

Detect XML/SVG/YAML entity expansion (Billion Laughs) vulnerabilities in parsers that allow unbounded entity definitions.

Systematic false positive elimination for security findings. 6-gate verification, 13-item checklist, devil's advocate questioning. MANDATORY before any CVE submission.

Detect JWT implementation vulnerabilities including algorithm confusion, none algorithm acceptance, weak secrets, and JWK injection attacks.

Detect method clobbering via user-controlled object keys that overwrite built-in methods like toString, valueOf, or hasOwnProperty, causing crashes or logic bypass.

Detect path traversal and Zip Slip vulnerabilities where user-controlled path components can escape intended directories.

Detect prototype pollution via object merge/clone/assign operations where __proto__ or constructor.prototype keys can modify Object.prototype.

Detect stack overflow and infinite recursion DoS in recursive parsers, tree walkers, and serializers that lack depth limits.

Detect Regular Expression Denial of Service (ReDoS) where crafted input causes catastrophic backtracking in regex patterns applied to user-controlled strings.

Generate polished, human-sounding vulnerability disclosure reports for GHSA, HackerOne, and email. Auto-selects channel, calculates CVSS, and adapts tone.

Detect VM/sandbox escape vulnerabilities in packages using node:vm, simpleeval, or custom sandboxes that can be bypassed to achieve code execution.

Detect SQL injection where user input reaches SQL query construction through string concatenation, template literals, or ORM raw query methods.

Detect Server-Side Request Forgery where user-controlled URLs can reach internal services, cloud metadata endpoints, or bypass network boundaries.

Detect Server-Side Template Injection where user input is passed as the template string itself rather than as template variables, enabling code execution.

Target discovery methodology for finding high-quality npm/PyPI/GitHub packages to audit for vulnerabilities, with evaluation criteria and search strategies.

Detect XML External Entity injection where XML parsers process untrusted input with external entity loading enabled, allowing file read or SSRF.