Polymarket halts trading after $2.65 million exploit on a third-party provider
Polymarket moved its exchange to cancel-only mode after roughly $2.6 million was drained. The platform blames a compromised third-party provider.
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what happened
According to The Block, the prediction market platform Polymarket lost more than $2.6 million within minutes. The company switched its exchange to cancel-only mode, so users can cancel orders but no new trades go through, and relayer actions remain paused during the investigation.
According to Arkham data, a wallet believed to belong to a suspected attacker holds about $2.65 million in POL after several recent USDC.e-to-POL swaps via Relay. Some of the funds have since been moved to other addresses.
Later, Polymarket said it had found the cause and fixed it, and that one of its third-party providers was compromised. The company has referred the matter to law enforcement. The story is still developing.
why it matters
For traders, this is a reminder of the risks tied to third-party services in crypto infrastructure. No direct impact on major financial markets is visible yet, but the incident could weigh on confidence in similar platforms and related tokens.
market impact
POL and the prediction markets segment: the exploit undermines confidence in the platform and its infrastructure.
tags
instruments
sources
- Polymarket pauses trading after $2.65 million exploit, says third-party provider was compromised — The Block, 29 October 2026 at 19:00 UTC
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