Use after free in TabStrip in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted Chrome extension. (Chromium security severity: Medium)
CVE-2026-121257
CVSS base score
9.6 (v3.1)
Severity
CRITICAL
Attack vector
Network
Weakness
CWE-416
Last modified
November 5, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected products
google chrome
References
- chromereleases.googleblog.com Release Notes, Vendor Advisory
- issues.chromium.org Permissions Required