Incorrect handling of CORS in ServiceWorker in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to leak cross-origin data via a crafted HTML page.
Severity
CVSS 3.0
6.5 medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS
0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)