Zano, a privacy-focused layer-1 blockchain — an independent base network rather than an application built on another chain — has suspended economic activity across its network after the discovery of an inflation bug tied to its Gateway Addresses feature. According to the report, the vulnerability allowed the unauthorized creation of additional assets, prompting the project to halt transactions and prepare a rollback covering roughly 24 hours of blockchain activity.

The incident was identified on Sept. , 2026. Zano instructed users to stop economic activity involving ZANO and Confidential Assets until the situation is resolved, and the project has indicated that users affected by the incident will be reimbursed for resulting losses.

The team plans to rewind approximately 24 hours of blockchain history to remove the effects of the inflation bug, keeping economic activity involving ZANO and Confidential Assets suspended throughout the recovery process. Several key details, however, remain undisclosed: the precise block height for the rollback (the exact point in the chain to which the network would rewind), the total number of unauthorized coins created, and the mechanism that will be used to compensate affected users. Those open questions leave the full extent of the incident uncertain while recovery efforts continue.

Gateway Addresses Feature Linked to the Bug

The vulnerability is connected to Gateway Addresses, a feature introduced through Zano's Hard Fork 6, a protocol upgrade that changes the network's core rules and requires participants to adopt the new software. The upgrade activated on mainnet at block 3,833,000 around Aug. 26, 2026. Gateway Addresses were designed to support service integrations while preserving the privacy characteristics of the network, but a flaw in the implementation reportedly created a pathway for unauthorized asset issuance.

The discovery carries particular weight because Zano's economic model depends on controlled issuance. The network operates on a fixed emission schedule with a block reward of 1 ZANO, and transaction fees are burned rather than distributed to miners — a structure intended to make supply increasingly deflationary over time. An inflation vulnerability therefore strikes at a fundamental element of the network's monetary design. Beyond the immediate financial impact, the incident raises questions about the reliability of supply controls and the safeguards surrounding new blockchain features.

Rollback Leaves Recent Transactions in Limbo

Full rollbacks of an active blockchain are rare, and they are generally reserved for situations in which a network's core issuance guarantees have failed. A rollback of approximately 24 hours would affect legitimate transactions as well as activity directly connected to the vulnerability. Transfers, trades, and other transactions recorded during the affected period could be removed from the blockchain's history once the network is restored to an earlier state, leaving users uncertain about balances, transfers, and asset movements until the chain is rebuilt.

According to the report, the project has retained sufficient control and coordination capacity to carry out the rollback. Its stated commitment to reimburse affected users could help address losses, but the absence of detailed compensation procedures means users do not yet have a complete picture of how claims will be handled. The decision also underscores the trade-off between blockchain immutability and emergency intervention: a rollback can erase unauthorized activity, but it simultaneously alters the historical record relied upon by legitimate participants.

Privacy Blockchain Sector Faces Added Scrutiny

The Zano incident comes as privacy-focused cryptocurrencies confront broader questions about technical reliability and regulatory treatment. Privacy networks are designed to limit the visibility of transaction information — characteristics that have attracted scrutiny from regulators and financial platforms concerned about compliance requirements. Several privacy-focused assets have faced restrictions or delistings in different jurisdictions, according to the report. The two pressures differ in kind: regulatory action concerns how privacy features fit within compliance frameworks, while a supply-integrity bug tests whether a network's internal issuance controls function as designed. Against that backdrop, technical incidents involving supply integrity add another challenge for projects seeking wider adoption.

The Zano team acknowledged the vulnerability in a public statement:

Security update and coordinated upgrade: The core team has identified a vulnerability in public Gateway Addresses that affects asset issuance, including fUSD. Transaction privacy is unaffected, and no spend keys or wallets are compromised. We will coordinate a network… — Zano (@zano_project) September 25, 2026

For Zano specifically, the issue is magnified because monetary integrity is closely tied to its value proposition. A network that uses fee burning and controlled emissions depends on users having confidence that its supply rules are being enforced correctly.

Recovery Hinges on Transparency

The immediate priorities are completing the rollback without creating additional discrepancies and determining the amount of unauthorized issuance. The project will also need to clarify how legitimate transactions affected by the rollback will be restored or reconciled.

Transparent disclosure of the affected blocks, the unauthorized issuance, the rollback process, and the reimbursement mechanism will be central to restoring confidence among Zano users and developers. Until those details are released, the full financial and operational impact remains unclear.

The event underscores the risks that can accompany major blockchain upgrades, particularly when new functionality interacts with a network's core monetary and privacy mechanisms. Zano's response will now be closely watched as the project works to restore normal economic activity and establish the final scope of the vulnerability.