Topic
JWT authentication is a token-based scheme for verifying identity in web and API apps, with known pitfalls in signature and claim validation.
A developer running 12 iOS apps swapped fastlane's expiring session cookies for a non-expiring App Store Connect API key. The trap on the way there comes back as a silent 401.
Reality
WSO2 published the fix in May. watchTowr saw forged tokens arrive at its honeypot in September. Its own replay against a correctly targeted deployment came back with the credentials the gateway holds.
Reality
The failure depends on your Next.js version, your platform and the query itself, so it can pass locally and misbehave in one region; opting middleware into the Node runtime fixes it and hands back the edge placement you adopted middleware for.
Reality
pydantic-jwt gives a real type to the one payload most Python services still pass around as dict[str, Any]. The same constructor that signs tokens is why version 1.0.0 needed an opt-in flag to refuse unverified input.
Reality
A dev.to walkthrough starts with a friend whose attacker survived a password reset. The tutorial path to JWT auth ships with no per-user revocation at all.
Reality