ZachXBT Flags Polymarket Smart-Contract Exploit With $520,000 in Losses

Source Beincrypto

On-chain investigator ZachXBT issued a community alert flagging an apparent exploit of Polymarket’s UMA CTF Adapter.

The UMA CTF Adapter is the smart contract that lets Polymarket’s prediction markets settle using UMA’s Optimistic Oracle

According to the alert, attackers have drained more than $520,000 so far. ZachXBT highlighted that the attacker’s address was 0x8F98075db5d6C620e8D420A8c516E2F2059d9B91.

According to Bubblemaps, the exploiter has since dispersed the proceeds across 15 addresses. This pattern is typically seen in the early stages of an on-chain laundering attempt.

Follow us on X to get the latest news as it happens

The situation is developing, and the full scope of the incident, as well as any response from Polymarket, has yet to be confirmed. BeInCrypto has contacted Polymarket for comment on the reported exploit and will update this story as more information becomes available.

The Polymarket incident lands amid a broader spike in DeFi exploits this month. May has already produced five separate hacks in the past week alone, pushing the monthly tally to 19, according to DeFiLlama data. Cumulative losses across those incidents have reached roughly $38.2 million.

Subscribe to our YouTube channel to watch leaders and journalists provide expert insights

Disclaimer: For information purposes only. Past performance is not indicative of future results.
placeholder
The Silver Short Squeeze: Only 14% of Futures Are CoveredSilver futures surged past $117 on January 29, extending a historic rally with 275% gains over the past year. A severe physical supply crunch is driving the surge. Warehouse inventory now covers just
Author  Beincrypto
Jan 29, Thu
Silver futures surged past $117 on January 29, extending a historic rally with 275% gains over the past year. A severe physical supply crunch is driving the surge. Warehouse inventory now covers just
placeholder
Gold Prices Surge Amid Rising U.S.-Iran Tensions, Driving Safe-Haven Demand to New HeightsGold prices rebounded Wednesday, climbing 0.9% to $4,995.60 an ounce as geopolitical tensions between the U.S. and Iran heightened demand for safe-haven assets, despite recent market volatility.
Author  Mitrade
Feb 04, Wed
Gold prices rebounded Wednesday, climbing 0.9% to $4,995.60 an ounce as geopolitical tensions between the U.S. and Iran heightened demand for safe-haven assets, despite recent market volatility.
placeholder
Gold’s 21% Fall Forms 106 Year Record While Bitcoin Stabilizes At $71,000Gold, the long-standing store of value, has recorded its worst consecutive losing streak in over a century. The yellow metal fell from $5,193 to $4,098 at its worst, a decline of nearly 21%, before re
Author  Beincrypto
Mar 26, Thu
Gold, the long-standing store of value, has recorded its worst consecutive losing streak in over a century. The yellow metal fell from $5,193 to $4,098 at its worst, a decline of nearly 21%, before re
placeholder
Strategy accelerates Bitcoin accumulation as STRC inflows hit $2B weekly highStrategy generated over $2 billion this past week alone through its ongoing STRC preferred stock offering. Data from Bitcoin Treasuries shows significant capital flowing into Strategy’s STRC from May 11 to May 14. Their tracking shows the company pulled in the equivalent of 2,543 BTC on May 11, 2,982 BTC on May 12, and 5,164...
Author  Cryptopolitan
May 18, Mon
Strategy generated over $2 billion this past week alone through its ongoing STRC preferred stock offering. Data from Bitcoin Treasuries shows significant capital flowing into Strategy’s STRC from May 11 to May 14. Their tracking shows the company pulled in the equivalent of 2,543 BTC on May 11, 2,982 BTC on May 12, and 5,164...
placeholder
Flare CEO says XRP set for institutional leap with confidential compute and DeFi expansionHugo Philion, co-founder and CEO of Flare, wants to create a system that allows institutions to trade and lend using XRP-backed assets without exposing their activity to the public. The new system, called Confidential Compute, will launch in Q3 2026. Philion spoke in an interview with crypto YouTuber Crypto Sensei on YouTube, saying Flare is...
Author  Cryptopolitan
8 hours ago
Hugo Philion, co-founder and CEO of Flare, wants to create a system that allows institutions to trade and lend using XRP-backed assets without exposing their activity to the public. The new system, called Confidential Compute, will launch in Q3 2026. Philion spoke in an interview with crypto YouTuber Crypto Sensei on YouTube, saying Flare is...
goTop
quote