CVE-2026-121211

High CVSS 8.3

Published 2026-11-03 · last changed 2026-11-05

The fix

We hold no Microsoft remediation data for CVE-2026-121211, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

Use after free in PowerBookmarks in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to execute arbitrary code outside the sandbox via a crafted Chrome extension. (Chromium security severity: High)

Sources

NVD record for CVE-2026-121211

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H