OpenSea — Cyber Attacks, Breaches & Threat Activity

Threat entity extracted from intelligence sources

Frequency
3
occurrences
First Seen
November 11, 2025
Last Seen
February 14, 2026

Related Threat Clusters

  • Zero-Day Exploit for OpenSea Listed for Sale by Threat Actor

    A threat actor is selling a critical severity zero-day exploit chain targeting OpenSea for $100,000 USD in Bitcoin or Monero. The exploit is reported to affect the Seaport protocol's order validation logic across…

    2 articles · Updated February 14, 2026
  • Polymarket Users Lose $500,000 in Phishing Attack

    Polymarket has experienced a significant phishing attack that has resulted in users losing over $500,000. The attack exploited vulnerabilities within the platform's section, affecting individual investors and…

    2 articles · Updated November 11, 2025
  • Polymarket Faces Security Breach Amid Phishing Attack

    Polymarket has experienced a significant security breach due to a phishing attack, resulting in users losing over $500,000. The attack has raised alarms among traders, particularly as the platform prepares to re-enter…

    2 articles · Updated November 11, 2025

Recent Intelligence Reports

  • Threat actor Allegedly Selling Critical Severity OpenSea 0 — Cybersecuritynews · February 14, 2026
  • Threat Actor Allegedly Selling Critical Severity OpenSea 0 — Cybersecuritynews · February 14, 2026
  • Polymarket Suffers Major Security Breach — Onesafe · November 11, 2025

CVSS v3.1 Breakdown