Monitoring

Was Polymarket International hacked? Yes — twice: 2026 $3.0M · 2026 $2.7M · last checked 2026-10-31 05:00 UTC · the full record

Polymarket International

MEDIUMPolygon·Supply Chain Attack·#424 all-time
$2.7M stolenThursday, October 29, 2026 · 2 days ago

Corpus updated 2026-10-31

What happened

  • Polymarket International, a prediction market, lost $2.7M on October 29, 2026.

  • The 72nd largest of the 321 incidents recorded in 2026 so far: under 1% of the $8.73B lost to hacks that year.

  • One other incident was recorded the same day: Binance CEX ($6.36B).

  • This is the 2nd recorded incident at Polymarket International; the previous one was in June 2026, $3.0M.

  • Supply Chain Attack is behind 9 recorded incidents totalling $233.4M; this is the 5th largest of them.

Cite this record

Monitoring Room, "Polymarket International hack (2026) — $2.7M stolen", incident record, data: DefiLlama hacks dataset, as of 2026-10-31 05:00 UTC. https://monitoringroom.com/situation/crypto-hack/polymarket-international-2026

Other recorded incidents at Polymarket International

DefiLlama records 2 separate incidents under this name.

Polymarket International — 2026
Polygon$3.0M

Nearby in the record

Hifi Finance
10/28/2026$0
Binance CEX
10/29/2026$6.36B
zkLink Nova
10/28/2026$783K
Fence Finance
10/27/2026$1.0M
Predict Fun
10/27/2026$400K
Zilliqa X-Bridge
10/27/2026$0

Call what happens next

Crypto hacks

Will a crypto hack of $10M or more happen between 2–8 November 2026?

No calls yetas of 05:55 UTC
Rules
Measured
Crypto hacks of US$10,000,000 or more, by the incident's listed date (UTC)
Window
2026-11-02 00:00 → 2026-11-09 00:00 UTC (end not included); calls close 2026-11-08 00:00 UTC
Source
DefiLlama hacks dataset
Read order
DefiLlama hacks dataset (live) → MonitoringRoom's stored copy of the dataset — a YES only; a NO waits for the live feed
Void
If the source stops publishing before close, the question is void and unscored.

YES if DefiLlama's hacks dataset lists an incident dated 2–8 November 2026 (UTC) with an amount of US$10,000,000 or more. Late listings count until 7 days after the window ends.

Resolver: MonitoringRoom, automatic from DefiLlama hacks dataset

Calls close 8 Nov, 00:00 UTC · Resolves from defillama.com

← All incidents

Source: DefiLlama · 1329 recorded incidents · data as of 2026-10-31 05:00 UTC