Citrea said it has suspended cross-chain bridging for ctUSD, USDC, USDT, WBTC and CTR following a security incident involving third-party application Zentra Finance, while stating that the Citrea protocol and its cross-chain contracts were not affected.

In its incident notice, Citrea said the suspension applies specifically to cross-chain transfer functionality for the affected assets. The move appears to be a containment step while the teams investigate the security issue tied to Zentra Finance.

Citrea said its protocol and cross-chain contracts remain unaffected. It also said funds stored outside Zentra Finance are not impacted, drawing a boundary between the third-party application's exposure and the rest of the network's core infrastructure.

Other network functions are continuing to operate normally, according to the team. Citrea added that it is working with the Zentra team on the investigation and will restore cross-chain functionality once it confirms that doing so is safe.

The current disclosure does not specify the cause of the incident, whether any assets held within Zentra Finance were lost or frozen, or how long the suspension may last. Citrea said it will provide further updates as the investigation progresses.

Why It Matters

The incident highlights a recurring risk in crypto market structure: user exposure can emerge from third-party applications even when a network's core protocol and bridge contracts are described as unaffected. That distinction matters for assessing operational contagion, counterparty boundaries and where security assumptions actually sit.

It also matters because temporary bridge suspensions can disrupt asset mobility across venues and ecosystems, especially for widely used tokens such as USDC, USDT and WBTC. Even without evidence of a core protocol failure, a pause in transfers can still affect access, settlement timing and confidence until the scope of the incident is clearly defined.