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Why Cursor Decodes JWTs Instead of Verifying Them (CWE-347)

This story is from 2026-10-10. It is preserved in the archive; the latest stories are on the live feed.

TL;DR AI editors regularly write auth middleware that calls jwt.decode() where it needs jwt.verify() , so the token's signature is never checked. Anyone can then edit the payload, set "role": "admin" , and walk in. The forged token never has to be signed. The fix: verify every token with a pinned a…

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  1. 2026-10-10 13:55 · DEV Community — AI
    Why Cursor Decodes JWTs Instead of Verifying Them (CWE-347)

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