dns-rebinding
DNS rebinding attack to bypass browser same-origin policy and reach IMDS/localhost/internal services: TTL=0 rebind mechanics, rbndr.us/singularity tooling, browser DNS cache pinning, chaining into AWS/GCP/Azure IMDS credential pivot. Use when SSRF is blocked but a victim browser can be induced to make requests, or when a localhost service is exposed. Triggers on: 'dns rebinding', 'rebind', 'DNS TTL 0', 'singularity', 'rbndr', 'localhost bypass via browser', 'imds via browser', 'SSRF via DNS'.
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