Bitcoin Network Flooded With 200,000 Fake Node Addresses Since April 9, Sparking Sybil Attack Concerns

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According to Bitcoin developer Jameson Lopp, roughly 200,000 unreachable node addresses have been flooding Bitcoin's peer-to-peer network since April 9, 2026, raising concerns about a potential Sybil-style attack. The anomaly caused ADDR messages—the protocol nodes use to share peer addresses—to spike from approximately 50,000 daily to over 250,000, polluting the system with fake and unreachable coordinates. Rather than targeting block validation directly, the unknown actors appear to be attempting to manipulate Bitcoin's peer discovery mechanism, potentially isolating individual nodes from the broader network.
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