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Actively Exploited Chromium Sandbox RCE Affects All Major Browsers

MonitoringAI & TechSecurity incidentFirst tracked 2026-09-05Last changed 2026-09-05

Current outcome

A type-confusion vulnerability in V8, tracked as CVE-2026-85046, is being actively exploited in the wild and affects Chromium-based browsers prior to version 152.0.7977.82. A crafted HTML page can let a remote attacker run arbitrary code inside the browser sandbox. Since Chrome, Edge, Brave, and most other major browsers share the Chromium engine, the flaw exposes billions of users to a credible, actively exploited attack. It highlights the fragility of relying on a single rendering engine across the web and makes urgent patching essential for both consumers and enterprises. The bug is a type confusion in V8, Chrome's JavaScript and WebAssembly engine, and carries a CVSS score of 8.8 (High). Google fixed it in Chrome 152.0.7977.82 and reportedly paid a $1,000 bug bounty; users should also update Chromium derivatives because many browsers lag upstream releases.

Progress timeline

1 material updates
  1. #01
    Initial2026-09-04 21:52 · publication time

    Actively Exploited Chromium Sandbox RCE Affects All Major Browsers

    A type-confusion vulnerability in V8, tracked as CVE-2026-85046, is being actively exploited in the wild and affects Chromium-based browsers prior to version 152.0.7977.82. A crafted HTML page can let a remote attacker run arbitrary code inside the browser sandbox. Since Chrome, Edge, Brave, and most other major browsers share the Chromium engine, the flaw exposes billions of users to a credible, actively exploited attack. It highlights the fragility of relying on a single rendering engine across the web and makes urgent patching essential for both consumers and enterprises. The bug is a type confusion in V8, Chrome's JavaScript and WebAssembly engine, and carries a CVSS score of 8.8 (High). Google fixed it in Chrome 152.0.7977.82 and reportedly paid a $1,000 bug bounty; users should also update Chromium derivatives because many browsers lag upstream releases.

    Source evidence: negura

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