On October 18, 10 million CYS were minted without authorization through Cysic’s cross-chain bridge, and the team immediately suspended bridge services. The announcement was clear: only bridge message processing and minting were affected; the mainnet and other systems were fine.

I looked over the original announcement, and the wording is very deliberate—“limited to bridge message processing and minting.” In plain English: someone exploited the bridge’s minting permissions, creating 10 million tokens out of thin air, but the mainnet ledger wasn’t tampered with.

The problem is that bridge minting permissions are often a hidden faucet for the circulating supply.

I couldn’t find real-time figures for CYS’s circulating supply, but 10 million tokens is a significant amount for any small- or mid-cap project. The fact that the bridge contract can mint tokens means it has the authority to issue more.

That permission is meant to lock and release assets when bridging between chains. But if it’s called without authorization, it bypasses every governance process and sends tokens straight into the market.

The team says the mainnet is fine, and that may be technically true—the mainnet nodes weren’t compromised, and consensus wasn’t disrupted. But “the mainnet is fine” and “token holders are fine” are two different things.

If the extra 10 million CYS minted by the bridge have already entered the secondary market, the price pressure is real. If they haven’t, they’re still an overhang waiting to hit the market.

I’ve seen far too many projects try to reassure their communities by saying “only the bridge was affected,” but there’s no firewall between a bridge’s minting authority and the circulating supply.

While going through the data, I noticed that Cysic’s announcement didn’t say which address currently holds the 10 million CYS or whether they’ve been frozen. It only said bridging was suspended pending an investigation.

This kind of information gap is common, but it’s also what makes people most uneasy. You don’t know whether those 10 million tokens are sitting in a hacker’s wallet or have already been split into smaller orders and placed on exchanges.

Cross-chain bridge attacks aren’t new, but “unauthorized minting” and “theft of locked assets” have very different impacts. The latter steals existing supply; the former creates new supply.

Once that new supply enters circulation, it dilutes every token holder’s share—and there’s no limit: as long as the permission remains, more tokens can be minted.

Cysic was right to suspend bridging, but that doesn’t resolve the 10 million tokens that have already been minted. They need to be burned, or the team needs to prove they haven’t entered the market. Otherwise, saying “the mainnet was unaffected” is just technical self-reassurance.

I’m keeping an eye on two things: first, when Cysic discloses the on-chain destination of those 10 million CYS; and second, whether they burn the tokens or take a snapshot before restoring bridging.

If there’s no clear record of the address being frozen or the tokens being burned within a week, then the claim that “only the bridge was affected” deserves a question mark.

Bridge permission design is an old problem, but every time something goes wrong, someone uses “the mainnet is fine” as a shield. The mainnet may be fine, but your holdings are on the bridge.