---
title: "Polymarket Suspends Trading and Pauses Relayer Following Incident"
description: "The prediction platform has blocked new trades while allowing order cancellations after a trader reported an $800,000 account loss."
url: https://basisdesk.news/news/polymarket-halts-trading-pauses-relayer-incident
published: 2026-10-29T18:48:39.161Z
modified: 2026-10-29T18:48:39.161Z
section: Security & Hacks
author: Basis Desk Newsroom (AI-generated, source-verified)
sentiment: bearish
tickers: [BTC, ETH]
tags: [polymarket, prediction-markets, defi, security, exploits]
license: Quote with attribution to Basis Desk (basisdesk.news). Not financial advice.
---

# Polymarket Suspends Trading and Pauses Relayer Following Incident

The prediction platform has blocked new trades while allowing order cancellations after a trader reported an $800,000 account loss.

## At a glance

- **What happened:** Polymarket paused its relayer and suspended new trading orders on Oct. 29, 2026, following a reported $800,000 account drain.
- **Why it matters:** Active market participants are blocked from opening or closing positions via new orders, leaving risk exposure frozen while cancellations remain active.
- **Who is affected:** Polymarket traders, liquidity providers, and prediction contract holders.
- **What's next:** No next step announced.
- **Primary source:** [Polymarket Halts Trading and Pauses Relayer Amid Incident](https://thedefiant.io/news/security/polymarket-halts-trading-and-pauses-relayer-amid-incident) — thedefiant.io

## Key points

- Polymarket suspended order routing and halted its transaction relayer following an incident on Oct. 29, 2026.
- Users retain the ability to cancel pending orders, but all new buy and sell actions are blocked.
- A trader reported an $800,000 account balance drain leading up to the halt.

## Editorial remark

- **Context:** Polymarket shut down execution infrastructure and paused its relayer on Oct. 29, 2026, after a trader reported an unauthorized drain of $800,000 from their account balance.
- **Impact:** Traders and market makers on Polymarket cannot submit new bids or asks, though existing positions and pending limit orders can still be manually canceled by users.
- **Watch:** Official incident retrospectives and an announcement regarding the restoration of relayer services and full order execution capabilities.

Prediction market venue Polymarket suspended trading and paused its relayer following an operational security incident on Oct. 29, 2026 [1]. Under the current restrictions, users remain able to cancel existing orders, but the platform has blocked all incoming buy and sell transactions [1].

The service interruption follows a report from a trader who stated that approximately $800,000 was drained from their platform account [1]. The protocol operator moved to disable core order routing and order execution functions to mitigate further potential disruption across its active markets [1].

## Platform Halts and Trading Status

The pause targets the platform's relayer layer, which manages off-chain order matching and transaction submissions to the underlying chain [1]. While order cancellation functionality remains accessible to prevent unwanted executions, participants cannot enter new positions or adjust liquidity while relayer operations stay offline [1]. The halt leaves active prediction contracts temporarily inaccessible for new volume [1].

The incident occurs alongside broader security concerns across decentralized ecosystems, which have experienced halts during suspected vulnerabilities, such as when [Initia halted its Layer 1 and rollups following a mint exploit](https://basisdesk.news/news/initia-halts-l1-rollups-mint-exploit) earlier in the month. Polymarket has categorized the ongoing event under exploits as its team responds to the disruption [1]. At the time of writing, $BTC traded down 0.5% over the prior 24 hours at $80,570, while $ETH fell 1.1% to $2,325.

Platform participants face restricted market operations while the relayer remains halted [1]. Market watchers are tracking further disclosures regarding whether the $800,000 drain stemmed from compromised private credentials or a contract-level vulnerability, as well as official confirmation on the resumption of standard order processing [1].

## Sources

1. [Polymarket Halts Trading and Pauses Relayer Amid Incident](https://thedefiant.io/news/security/polymarket-halts-trading-and-pauses-relayer-amid-incident) — thedefiant.io, 2026-10-29

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Basis Desk Newsroom · AI-generated, source-verified · https://basisdesk.news/about/how-we-use-ai