Security review

Security Review

Review the current change like a security-minded senior. Prefer concrete findings over generic advice.

Scope

Focus on the diff and directly related call paths. Do not audit the whole repo unless asked.

Checklist

Auth & access

• Every sensitive action checks authentication and authorization
• IDs from the client are not trusted for ownership (userId in body ≠ proof)
• Admin/debug routes are gated; no "temporary" open endpoints

Input & data

• User input is validated at the boundary (type, length, allowlist)
• SQL/NoSQL/search queries are parameterized — no string concat
• HTML/Markdown/user content is escaped or sanitized where rendered
• File uploads: size limits, type allowlist, stored outside web root, randomized names
• Path joins cannot escape intended directories (../)

Secrets & config

• No secrets in source, logs, client bundles, or example env files with real values
• New env vars documented; defaults are safe for production
• Tokens/passwords not written to analytics or error trackers

Network & server

• Outbound fetches do not accept raw user URLs without allowlisting (SSRF)
• CORS is least-privilege; credentials only when required
• Cookies: HttpOnly, Secure, SameSite where applicable

Dangerous APIs

• No eval, dangerouslySetInnerHTML, shell exec with unsanitized input
• Deserialization of untrusted data is avoided or hardened
• Crypto/auth libraries are standard — no home-rolled JWT/crypto

Output format

Group findings:

Severity	Rule	Where	Why it matters	Fix
Critical / High / Medium / Low / Note	short name	file:line or symbol	1 sentence	concrete change

End with:

• Blockers — must fix before merge
• Safe to ship with follow-ups — optional

If no issues: say so explicitly and list what you checked.