A vulnerability in Polygon, a framework used to build a cryptocurrency network, has been fixed. The bug, discovered on Dec. 3 by white hat hackers at bug bounty platform Immunefi, would have put 9,276,584,332 MATIC, worth nearly $23 billion at risk. Polygon says it was able to “immediately” fix the vulnerability with the help of white hats. The vulnerability consisted of a lack of balance/allowance checks in the transfer function of Polygons MRC20 contract and would have allowed an attacker to steal all available MATIC.”]
Source: https://www.cuinfosecurity.com/polygon-bug-put-23-billion-in-cryptocurrency-at-risk-a-18224