Zcash price has recovered roughly 50% from last week’s lows after a proposal for a new network upgrade sought to address concerns raised by a recently disclosed vulnerability that could have allowed the creation of counterfeit tokens. Summary ZEC price rebounded after Zooko Wilcox proposed the Ironwood upgrade to verify Zcash’s circulating supply. Ironwood follows a patched vulnerability that could have enabled unlimited counterfeit ZEC creation. Developers previously deployed emergency network upgrades, including the NU6.2 hard fork, to fix the flaw. According to Zcash founder Zooko Wilcox, the proposed Ironwood upgrade would give users a way to verify the cryptocurrency’s circulating supply by summing the balances held across active pools once the upgrade is activated. The proposal emerged days after Shielded Labs disclosed a critical flaw in Zcash’s Orchard shielded pool, the network’s main privacy-focused transaction system. Following the disclosure, Zcash’s market capitalization fell sharply from a peak of $10.48 billion to about $5 billion before rebounding to nearly $7.5 billion, according to CoinGecko data. Posting on X, Wilcox said Ironwood would allow users to independently confirm that the circulating supply is correct. He added that the upgrade would introduce a new location for users to hold shielded ZEC, place restrictions on transactions that could involve counterfeit coins, and incorporate measures such as AI-assisted security audits to strengthen the codebase. Emergency upgrades addressed the vulnerability Details released by Josh Swihart, founder of the Zcash Open Development Lab, show that developers had already deployed a two-stage response before the vulnerability became public. Swihart said the first step involved a soft fork that temporarily disabled Orchard transactions. Keeping the technical details private during that period reduced the possibility of exploitation while developers worked on a permanent fix. A second upgrade, known as the NU6.2 hard fork, was activated on June 3 and resolved the underlying issue before Orchard transactions were restored, according to Swihart. Shielded Labs stated that the flaw could theoretically have enabled an attacker to mint an unlimited amount of counterfeit ZEC. At the same time, the organization said it considered previous exploitation unlikely, although it acknowledged there was no cryptographic proof confirming the vulnerability had never been used. Because Orchard powers Zcash’s primary shielded transaction system through zero-knowledge proofs, the inability to conclusively verify whether the flaw had been exploited became a major concern following the disclosure. Ironwood seeks to restore supply confidence Against that backdrop, Wilcox presented Ironwood as a longer-term solution focused on increasing transparency around the network’s supply while preserving privacy features. His proposal noted that users would gain the ability to verify the circulating amount of ZEC immediately after activation by aggregating balances from active pools. According to Wilcox, the upgrade timeline remains uncertain and will depend on further development work and community discussions. Confidence that the vulnerability was never exploited was also reiterated in Wilcox’s post, although he did not provide definitive proof. Development efforts tied to the proposal involve several organizations, including the Zcash Foundation, Tachyon Group, Valar Group, and the Zcash Open Development Lab, according to Wilcox. Market sentiment improved following both the emergency fixes and the Ironwood proposal. Zcash (ZEC) climbed about 6% over 24 hours to roughly $445, while its market capitalization recovered significantly from the levels recorded immediately after the vulnerability disclosure, as per data from crypto.news.
