Critical (9.6) in google chrome. EPSS 0.3% chance of exploitation in the next 30 days.
Inappropriate implementation in iframe in Google Chrome prior to 77.0.3865.75 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
Severity
CVSS 3.1
9.6 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS
0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)