Polymarket users lose funds after security breach
The prediction market platform halted trading and will reimburse affected users following a compromise of a third-party provider.
AI-assisted coverage comparison, editor-supervised · How this was made
Polymarket users lose funds after security breach
Photograph: BNO News (embedded from source)
What this story says
- Polymarket users reported losing funds after malicious code was served through the company's website.
- The incident, discovered around 17:30 UTC, led to unauthorized withdrawals from user wallets.
- Polymarket identified a compromised third-party provider, DebugBear, as the source of the breach.
- The platform has promised to refund all affected users and has since resumed trading.
Who covered it
Percentages are shares of the 7 outlets carrying a published leaning rating. 9 of the 16 outlets we know ran this story carry no rating and are not counted in them. Coverage measured .
Trust
50/100
Craft
60/100
Hype
41/100
16 sources · methodology
Users of the prediction market platform Polymarket reported losing funds after a security breach on October 29, 2026. Malicious code was served through the company's website, leading to unauthorized withdrawals from user wallets. Polymarket identified and fixed the issue, attributing it to a compromised third-party provider, DebugBear. The platform halted trading on its international exchange following the incident and has promised to refund all affected users. Trading resumed later the same day.
Disagreement on the exact losses
Transaction records indicated losses of around $2.6 million, according to BNO News and BITRSS. However, coinotag.com stated that the exact amount of losses had not yet been disclosed. Gândul reported one user lost $800,000, citing Binance News.
What the coverage left out
None of the left-rated or centre-rated reports mentioned that Polymarket has referred the incident to law enforcement, as stated by BNO News and CNBC.
Still developing. We have re-checked which outlets are covering this 1 time, most recently on 29 Oct 2026, 20:00, and will add the sides that appear.
How other outlets pictured it
Which photograph to run is each newsroom’s own choice. The leaning beside a name is that outlet’s published rating, not a claim that the pictures divide along it. Every picture is shown from the outlet’s own server and links to the article it ran in.
How each side covered it
Our own reading of the reporting listed below, written from the outlets’ articles rather than quoted from them. The reasoning is set out on our methodology page.
Left
2 rated outlets
- CNBC and NBC News, both rated left, reported that Polymarket users had funds stolen due to a hack of a third-party provider. CNBC noted that the company's U.S. platform was not compromised and that the disruption came days before expected heightened volumes during the U.S. midterm elections. NBC News stated that impacted users would be 'made whole'.
Centre
5 rated outlets
- BNO News and Reuters, rated centre, reported that Polymarket users lost funds after a security breach involving malicious code served through the company's website. BNO News detailed that the issue was discovered around 17:30 UTC when users reported their wallets had been 'drained' and that Polymarket's official website was compromised when code from analytics company DebugBear began serving malicious code. Reuters reported that Polymarket would fully reimburse affected traders. Bloomberg reported that Polymarket stopped trading on its international exchange after a third-party software provider was compromised.
Right
0 rated outlets
No outlet rated right has run this story so far. We are still checking, and will say plainly if that does not change.
Questions about this coverage
- How did the left and right cover Polymarket users lose funds after security breach?
- Of the 7 outlets on this story carrying a published leaning rating, 29% are rated left, 71% are rated centre, 0% are rated right. Those percentages are shares of the rated outlets, not of every outlet that ran it, which was 16. The sections above set out what each side emphasised, in its own terms.
- Is Polymarket users lose funds after security breach left or right?
- Too few of the outlets on this story carry a published leaning rating to say. 7 of them do, and this site does not characterise a field under 12: at that size one newsroom filing moves the share by ten points. The percentages above are the count as it stands.
- Is the coverage of Polymarket users lose funds after security breach biased?
- Polymarket users lose funds after security breach is one event reported by 16 outlets, and this page does not rate the story as biased or unbiased. What it publishes is the spread: which outlets ran it, where named rating organisations place each of them on the spectrum, and what each side chose to lead with. A leaning rating describes an outlet's record over time, not this article, and the two should not be run together.
- Which outlets covered Polymarket users lose funds after security breach?
- 16 that we know of, every one of them listed further up this page with a link to its own report and to what we hold on the publisher. Nothing here is a summary of somebody else's summary: the outlets are named so the original reporting can be read.
- What happened to Polymarket users?
- Users of the prediction market platform Polymarket reported losing funds after a security breach on October 29, 2026. Malicious code was served through the company's website, leading to unauthorized withdrawals from user wallets. The platform has promised to refund all affected users.
- How much money was lost?
- Transaction records indicated losses of around $2.6 million. However, the exact amount was not immediately clear, with some reports stating the precise figure had not yet been disclosed and another citing one user losing $800,000.
- What caused the security breach?
- Polymarket attributed the incident to a compromised third-party provider named DebugBear. Malicious code from DebugBear was served through Polymarket's website, which was then used to gather information about active users and exploit trading credentials.
Read it at the source
16 outlets, grouped by the leaning a published rating gives them. Every headline links to the original; an underlined outlet name opens our profile of that publisher.
Left
2Centre
5- Polymarket resumes trading after third-party security breach, to reimburse users (opens Reuters in a new tab)
- Polymarket 'Fully Reimbursing' Users After Halting International ... (opens Forbes in a new tab)
- Polymarket suspends trading after third-party breach leads to user ... (opens Coin Desk in a new tab)
- Polymarket Trading Halted After Reports of Stolen Funds (opens Bloomberg in a new tab)
- Some Polymarket users report losing funds after security breach (opens BNO News in a new tab)
Right
0No outlet in this group ran the story.
Not rated
9- The Famous Polymarket Political Betting Platform Was Targeted by a Cyber Attack. A User Would Have Lost $800,000 (opens Gândul in a new tab)
- Polymarket Pauses Trading as Prediction Market Investigates Security Incident (opens BITRSS in a new tab)
- Polymarket Suspends Operations After Unauthorized Withdrawal Reports (opens DiarioBitcoin in a new tab)
DiarioBitcoin — is DiarioBitcoin biased? Our profile of this outlet
- Polymarket Halts Operations Following Third-Party Breach (opens coinotag.com in a new tab)
coinotag.com — is coinotag.com biased? Our profile of this outlet
- Polymarket Says It Will Replenish Users After Incident (opens SpaceMoney in a new tab)
SpaceMoney — is SpaceMoney biased? Our profile of this outlet
- Polymarket reports outage on international exchange, halts trading (opens BizToc in a new tab)
- Polymarket Pauses Trading as Prediction Market Investigates Security Incident (opens Decrypt in a new tab)
- Polymarket Pauses Negotiations and Claims to Be Investigating Security Incident (opens Livecoins in a new tab)
How did this read?
About the coverage, not about the story. We do not ask whether you agree with what happened — we have no honest use for that answer.
