15 articles tagged #Code Security
Your HTML sanitizer has an allowlist. You trust it. But stored XSS still lands in production — because allowlists are only as good as their edge-case handling. Here's exactly where they fail and how to close the gaps.
File upload endpoints are a reliable attack surface. Path traversal lets attackers overwrite server files; MIME spoofing sneaks malicious content past your type checks. Here's how to close both holes properly.
Your HMAC signature check looks correct, but if it uses a plain equality operator, an attacker can measure response times to forge tokens byte by byte. Here's how timing attacks work and how to fix them in every major language.
IDOR vulnerabilities let attackers swap an ID in a URL and access someone else's data. They're easy to miss in code review and devastatingly simple to exploit. Here's how to find them, fix them, and keep them out of production.
XXE vulnerabilities let attackers read local files, trigger SSRF, and even crash your server — all by slipping a malicious entity into an XML document. Here's how to find XXE flaws and close them for good.
ORMs like Django ORM, SQLAlchemy, and Hibernate give you a comfortable safety net — but that net has holes. Here's exactly where raw SQL sneaks back into ORM-heavy projects and how to close those gaps before an attacker finds them.
A Content Security Policy that looks correct on paper can be trivially bypassed in practice. Learn which common CSP patterns attackers exploit and how to tighten your policy before someone else does.
ChatGPT can scaffold a JWT auth flow in minutes, but the default output often skips token expiry checks, uses weak algorithms, or stores tokens unsafely. Here's how to prompt your way to production-ready authentication code.
GraphQL's flexibility is a double-edged sword. Introspection leaks your entire schema to attackers, and query batching can turn a single request into a denial-of-service weapon. Here's how to shut both doors.
CL-TE desync attacks slip malicious payloads through your reverse proxy by exploiting disagreements between Content-Length and Transfer-Encoding headers. Here's how they work and how to stop them cold.
A misconfigured redirect URI in your OAuth 2.0 flow can hand an attacker a valid authorization code and complete control of any user account. Here's exactly how these attacks work and how to shut them down.
A misconfigured CORS policy can let any website silently read your API responses on behalf of your users. Learn the exact patterns that create this exposure and how to fix each one before they become a breach.