Coinfeeds Daily → Vulnerability in zkSync Era Protocol Could Have Resulted in $2 Billion Loss

Vulnerability in zkSync Era Protocol Could Have Resulted in $2 Billion Loss

Published: Nov 06, 2023 | Last Updated: Mar 17, 2024
Howard Kane

Quick response from Matter Labs averts potential disaster, highlights importance of collaboration and security audits

In a recent turn of events, a significant vulnerability was discovered in the zkSync Era protocol by blockchain security firm, ChainLight. This vulnerability could have potentially led to a loss of nearly $2 billion. However, thanks to the quick response from the Matter Labs team, the issue was promptly resolved, averting a potential disaster.

Vulnerability in zkSync Era

This security vulnerability could have allowed a malicious actor to manipulate transactions and gain access to the funds of affected users. The potential loss from this exploit was estimated to be around $1.9 billion.

However, exploiting this vulnerability would have required a high level of security privilege and access to the protocol's backend or validator private key. This made it extremely difficult for any potential attacker to exploit the vulnerability.

Quick Response from Matter Labs

Upon discovering the vulnerability, ChainLight promptly alerted Matter Labs, the team behind zkSync Era. The Matter Labs team was able to quickly fix the issue, thereby preventing any potential loss. This swift response highlights the importance of collaboration between developers and security firms in ensuring the robustness of on-chain networks.

ChainLight Rewarded

For their role in identifying and reporting the bug, ChainLight was rewarded with a $50,000 USDC bounty. This incident underscores the importance of security audits and the crucial role they play in maintaining the integrity of blockchain networks.


This incident serves as a stark reminder of the importance of robust security in emerging on-chain networks. It also emphasizes the need for ongoing collaboration between developers and security firms to ensure the safety and security of these networks. Users are also encouraged to regularly check their favorite protocols for vulnerabilities to ensure their funds are safe.

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