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Morning Edition · Sunday, November 1, 2026Published at 1:46 AM EDT · New York
Privacy chain Iron Fish shuts down after a 2019 nullifier bug let an attacker spend shielded coins repeatedly
The attacker withdrew the duplicated coins through the ChainPort bridge, and Crypto Times reports that 2.98 billion wrapped IRON tokens were minted on Base.
On October 31 Iron Fish, a privacy-focused layer-1 blockchain, announced the end of all network support and the archiving of its code. The cause was an inflation bug that had been present since early 2019. The root cause was a logic flaw in…
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Hidden Inflation Becomes the Core Risk of Shielded Chains
Because shielded pools hide amounts, bugs that create coins can sit undetected for years, so privacy chains will keep facing rollbacks, shutdowns and bridge-side supply checks as review of their old code accelerates.
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