Access-Control

Authentication Bypass Security Guide 🆕 Updated September 12, 2026 — added the Veeam VSPC chain (CVE-2026-58073 + CVE-2026-58072): a GUID trusted as a credential, and a branch with no else. Authentication bypass vulnerabilities represent critical security flaws that allow attackers to circumvent authentication mechanisms and gain unauthorized access to systems, applications, or user accounts. Introduction Authentication bypass attacks target weaknesses in login mechanisms, session management, and access control implementations. These vulnerabilities can lead to complete account takeover, privilege escalation, and unauthorized access to sensitive data. ...

Comprehensive Authorization & Access Control Guide 🆕 Updated September 12, 2026 — added the SolarWinds Web Help Desk SAML bypass (CVE-2026-28323): when parameter presence selects the auth path, the attacker picks it. A practitioner’s reference for Broken Access Control (OWASP A01) — the models, bug classes, bypass techniques, real-world chains, and detection/prevention patterns that matter in modern web and API testing. Includes privilege escalation CVEs disclosed through 2026. 🔥 Latest Update: May 2, 2026 - Enhanced with 2026 privilege escalation CVEs including CVE-2025-26244 (DeimosC2), CVE-2026-25253+ (OpenClaw chain), CVE-2025-53767 (Azure OpenAI) from automated security intelligence. ...

I’ve been hunting access control bugs for over a decade, and let me tell you - they’re everywhere. When OWASP moved broken access control to #1 in 2025 and merged SSRF into this category, I wasn’t surprised. I was relieved that the security community finally caught up to what I’ve been seeing in the wild. 94% of applications tested have broken access control issues. That’s not a typo - it’s a security apocalypse hiding in plain sight. ...