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[H4ckN3ws]n8n Token Exchange Flaw Could Let Attackers Log In as Users From Another Issuer


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n8n, the workflow automation platform, handed out the wrong accounts at login. On Enterprise instances configured to trust more than one external token issuer, it matched an incoming JWT to a local user on the sub claim alone and ignored iss. A valid token from issuer A carrying a sub that belongs to someone under issuer B logged you in as them. Their password never

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