Zcash Orchard Pool Had Serious Forgery Vulnerability, Could Generate Unlimited Undetectable ZEC
Zcash founder Zooko Wilcox disclosed that the Zcash Orchard privacy pool previously had a serious vulnerability that could be used to generate an unlimited amount of undetectable forged ZEC. This vulnerability was discovered by security researcher Taylor Hornby during a targeted audit using the Anthropic Opus 4.8 model on May 29 and was promptly reported to the Zcash Open Development Lab (ZODL).
ZODL coordinated an emergency response within the ecosystem, and the relevant fix was completed on June 2. The vulnerability stemmed from an insufficiently constrained element in the Orchard circuit, which had existed since its activation in May 2022 until the emergency fix was deployed on June 1, 2026.
Hornby wrote a complete attack program in a local regtest environment using Opus 4.8, which could generate an unlimited amount of forged ZEC. Due to the privacy attributes of Orchard, it is currently impossible to fully determine whether it was exploited before the fix. Shielded Labs believes the likelihood of exploitation is low and is exploring network upgrades to introduce new privacy pools while accounting for Orchard pool tokens to verify supply integrity.
Source: Public Information
ABAB AI Insight
Zcash founder Zooko Wilcox has previously emphasized the transparent governance of privacy protocols, and this proactive disclosure continues Zcash's tradition of responsible disclosure. Taylor Hornby quickly discovered the long-hidden circuit vulnerability using Anthropic Opus 4.8, demonstrating that cutting-edge AI models have become important tools in crypto security audits.
On the capital front, the Zcash team quickly fixed the vulnerability after its discovery and plans to introduce a verifiable supply mechanism to rebuild market trust in the integrity of the Orchard pool. Funding may be under short-term pressure due to the inherent volatility of privacy coins, but in the long term, it will concentrate on protocols that combine strong privacy protection with auditability.
This incident is similar to Zcash's historical circuit audits and fixes, as well as early cases of AI-assisted software vulnerability discovery. Zcash is currently at a critical stage of transitioning from a purely privacy-focused design to a "privacy + verifiable" hybrid architecture.
Essentially, this represents a technological replacement: AI is accelerating the security audit of crypto protocols, as Opus 4.8 helps quickly locate circuit constraint defects, while pushing the industry from "trust in privacy mechanisms" to a structural upgrade of "privacy + publicly verifiable supply," concentrating pricing power on crypto infrastructure that can balance privacy and transparency.
ABAB News · Cognitive Law
The stronger the privacy, the greater the need for verifiable integrity; privacy that cannot prove supply will ultimately become a trust black box.
The speed at which AI discovers vulnerabilities is surpassing human audit limits; the outcome of the security race is beginning to shift from auditing tools.
Truly reliable systems never avoid historical vulnerabilities but instead regain trust through stronger auditing and verification mechanisms.