CVE-2026-87491: Google Chromium V8 Out of Bounds Write Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2026-09-09. EPSS: 3.1% chance of exploitation in the next 30 days.

Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Affected products

• Google Chrome: before 153.0.8010.36 (fixed in 153.0.8010.36)

Published 2026-09-09. Last modified 2026-09-21.