Zcash crashes 48% after Claude AI uncovers unlimited…

Zcash plunged 48% after it emerged that Claude AI identified a critical vulnerability in the ZEC protocol that would have allowed unlimited minting of coins — effectively enabling an attacker to inflate the supply without limit. The flaw went undetected for four years before being patched on June 1st.

Why it matters

A silent, multi-year minting vulnerability is among the most severe categories of cryptographic failure a proof-of-work or shielded-transaction chain can suffer. The fact that it took an AI system — rather than a conventional audit — to surface the flaw raises immediate questions about the adequacy of human-led security reviews across the broader ecosystem. For ZEC specifically, the integrity of its shielded supply model is foundational to its privacy value proposition; any credible threat to supply auditability is an existential reputational risk.

Market impact

The 48% single-session drop reflects the market pricing in the worst-case interpretation: that the vulnerability may have been exploited silently during the four years it went unnoticed, potentially inflating circulating supply in ways that are difficult to verify on a privacy chain. Until Zcash's core team publishes a full post-mortem confirming no exploitation occurred, the uncertainty premium on ZEC is likely to remain elevated. Traders will be watching on-chain supply metrics and any official transparency report closely.