Polymarket faced what many users interpreted as a possible hack on May 22 after public alerts described a rapid POL drain on the prediction market platform. Polymarket-linked accounts later said the incident was not a smart-contract exploit and did not affect user funds or market resolution.
The first wave of concern came from on-chain investigator ZachXBT and blockchain analytics firm Bubblemaps. ZachXBT said a Polymarket admin address appeared to have been compromised on Polygon, with more than $520,000 drained at the time of his Telegram alert.
Bubblemaps then warned that attackers were removing 5,000 POL roughly every 30 seconds and that about $600,000 had been stolen so far, while advising users to pause Polymarket activity.
Polymarket’s later explanation shifted the issue away from core-market failure and toward an internal operational security breach. Findings pointed to a private-key compromise of a wallet used for “internal top-up operations,” according to Polymarket Devel
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