Vulnerability Discovered and Fixed in Binance’s BNB Beacon Chain
Jump Crypto, a Web3 infrastructure firm, has reported a flaw in the Binance BNB Beacon Chain that would have allowed the creation of an unlimited number of arbitrary tokens.
The BNB team was alerted to the issue, and within 24 hours, a patch had been developed and implemented. Jump Crypto detailed the vulnerability in a blog post on February 10th, explaining that it could have resulted in significant financial loss.
The Beacon Chain was built on top of Tendermint and the Cosmos SDK, but it deviated from the Cosmos SDK in several ways, which prompted extra caution in its review.
The flaw would have allowed an attacker to mint an almost unlimited number of BNB tokens through a malicious transfer, leading to destination accounts receiving a greater number of tokens than the sender intended.
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The BNB team resolved the issue by using overflow-resistant arithmetic methods. The BNB Chain is the native blockchain of Binance, a cryptocurrency exchange.
The CEO of Binance, Changpeng Zhao, thanked Jump Crypto’s team for reporting the bug. In October 2022, the BNB Chain was temporarily suspended due to a cross-chain exploit that resulted in the loss of nearly $80 million worth of cryptocurrency.
Alexander Stefanov
Reporter at CoinsPress
Alex is Editor-in-Chief of Coinspress and co-founder of Millennial Media Group, with nearly a decade of experience covering financial markets - crypto first, then everything else. It started in 2016 with Bitcoin. Like most people at the time, he didn't fully understand it - so he kept digging. Blockchain, tokenomics, the projects, the cycles. That curiosity never stopped, and eventually pulled him into traditional markets too: equities, commodities, macro. Not because he left crypto behind, but because you can't properly understand one without the other. What drives him is straightforward: he wants to know why something is happening, not just that it's happening. Most market coverage stops at the headline - price up, price down, here's a chart. Alex finds that kind of reporting actively unhelpful. If you walk away from an article without understanding the mechanism behind the move, what did you actually learn? He holds a degree in Tourism from New Bulgarian University - not the most obvious path into financial markets, but markets have a way of pulling in people who are simply too curious to stay out. He has authored over 200 in-depth analyses and more than 10,000 articles across crypto and traditional finance. He still thinks every day in markets teaches him something new. That's probably why he hasn't stopped.
