dev.to· Oct 6, 2026· by devomnitools

Why Decoding a JWT Is Not Verifying It (And How Security Bugs Slip Through)

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Last Tuesday, a staging auth bug had three devs stumped for half an afternoon. Nginx was spitting...
🎯 Vulnerability: OAuth 2.0 / JWT Authentication Bypass
💡 Defense Fix: Strictly verify JWT signatures on the backend, enforce state parameter validation, and reject 'alg: none'.
#security#webdev#javascript#backend

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