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Application Security

ReDoS in Python and FastAPI: how one regex takes down an event loop

CVE-2024-3772 let a single crafted email string trigger catastrophic backtracking in Pydantic's own validator — the exact code path every FastAPI request body runs through.

Jul 8, 20266 min read
Application Security

A practical REST API hardening checklist

OWASP's 2023 API Security Top 10 still ranks broken object-level authorization as the #1 risk — here's a concrete checklist for authn, rate limiting, and input validation.

Jul 8, 20266 min read
Application Security

SAML SSO vulnerabilities: signature wrapping and assertion replay explained

A 2024 ruby-saml flaw (CVE-2024-45409, CVSS 9.8) let attackers forge SAML assertions and log in as any user, including admins — seven years after the same bug class was first disclosed.

Jul 8, 20266 min read
Application Security

A vendor-neutral framework for evaluating SAST tools

OWASP's Benchmark suite has run 2,740 fixed Java test cases since 2016, yet most SAST comparisons still amount to a vendor's self-reported false-positive number.

Jul 8, 20266 min read
Application Security

A hardening guide to securing Flask applications

Flask ships session cookies with HttpOnly on by default — but Secure, SameSite, CSRF tokens, and every security header are left entirely to you.

Jul 8, 20266 min read
Application Security

Secure multi-tenant SaaS access control patterns

Broken Access Control has topped OWASP's Top 10 for two straight cycles, found in 100% of tested apps in 2025 — most of that risk starts with one missing tenant_id check.

Jul 8, 20266 min read
Application Security

Secure password hashing in Go: bcrypt, Argon2, and the mistakes in between

Go's bcrypt package caps input at 72 bytes and returns ErrPasswordTooLong instead of silently truncating — one of several Go-specific quirks that trip up password hashing code.

Jul 8, 20266 min read
Application Security

Secure URL Encoding and Decoding in Java

Java's URLEncoder turns spaces into + instead of %20 — a form-encoding quirk that, mixed with double-decoding, still causes path-traversal bugs like CVE-2025-41242 in 2025.

Jul 8, 20266 min read
Application Security

Secure session lifecycle management: tokens, rotation, and cookie flags

OWASP requires session IDs carry at least 64 bits of entropy, yet a 2007 Rails flaw shows one dropped attribute is enough to make fixation trivial.

Jul 8, 20266 min read
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