InfoSecBulletin Cybersecurity for mankind
Polymarket is a platform for prediction markets using cryptocurrency. It lets users bet on what might happen in real-life events like elections, economic data, sports, and cultural events.
The company has shared little information about the incident.
Polymarket Hack Reportedly Results in $3 Million Theft
Anthropic Confirms US Infrastructure Redeployment of Claude Mythos 5
Hackers Target Cloudflare-Hosted AWS Domains to Steal Console Logins
Daily Cyber security update for 26. 06. 2026
WhatsApp to Alert Users Before Chatting With New Numbers
OpenAI unveils its first custom chip, Named Jalapeño
Bajaj Auto System Hit by a Ransomware Attack
Cisco Unified CM flaw CVE-2026-20230 exploited in attacks
LastPass says hackers stole customer data via Klue, supply chain breach
New Apple Exploit Bypasses Boot Defenses, Possibly Affects Millions of iPhones Worldwide
“This morning we discovered a 3rd party vendor had been compromised, injecting a malicious script into our frontend for some users. We’ve contained it & removed the affected dependency,” Polymarket said in a Thursday post on X.
It said that affected users will be reached out to and given back their money, but it didn’t say how many users were hurt and how much cryptocurrency was taken.
Blockchain security company PeckShield reported that roughly $3 million worth of pUSD, Polymarket’s USDC-backed trading currency, was stolen via a phishing campaign.
“The attacker bridged the stolen funds from Polygon to Ethereum and swapped them into ~1,893 ETH,” PeckShield said.
A blockchain expert said that the losses are reportedly about $3 million, with money taken from at least 11 people. It is not known who did the attack.
Related news:
Anthropic Confirms US Infrastructure Redeployment of Claude Mythos 5
