Last updated: April 29, 2026
“Session” is overloaded: browser session (open tabs), server session (data keyed by session ID), application session (the user’s logical workflow). Each has different lifetime; each has different invalidation rules.
The bug pattern: developer thinks “user logged out, session ended.” Browser session ended. Server session may persist. JWT may still be valid. OAuth refresh token still works. App-level workflow state still cached.
The mindset: at logout, list every session type and verify each is invalidated. At session timeout, same.
Module Quiz · 3 questions
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