Zcash fell sharply after developers disclosed a critical vulnerability in its Orchard shielded pool that could theoretically have allowed an attacker to create unlimited counterfeit ZEC without detection. The flaw was discovered by security engineer Taylor Hornby, who was engaged by Shielded Labs and credited Anthropic’s Claude with helping develop a working exploit in a local testing environment. The vulnerability was addressed through emergency upgrades, including disabling Orchard transactions and later restoring the pool with a corrected circuit. The market reaction was severe. ZEC dropped as much as 48% after ... (full story)