CVE-2026-121257

CriticalCVSS 9.6/10Last modified Nov 5, 2026

Description

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)

Metrics

CVSS 3.1 9.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published: Nov 3, 2026
Last modified: Nov 5, 2026
NVD status: Analyzed

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