CVE-2026-121250

Critical

Description

Use after free in Extensions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to potentially execute arbitrary code outside the sandbox via a crafted Chrome extension. (Chromium security severity: High)

SeverityCritical

CVSS9.6

Exploit probability—

Product

Chrome

PublishedNov 3, 2026

First seenNov 4, 2026

Weakness typeCWE-416Use after free

How to fix

Update

Google Chrome157.0.8103.38 or later
google chrome157.0.8103.38 or later

Vendor advisories

chromereleases.googleblog.com/2026/11/stable-channel-update-for-desktop.html

Affected products

Product	Affected versions	Fixed in
Google Chrome	157.0.8103.38	157.0.8103.38
google chrome	v < 157.0.8103.38	157.0.8103.38

Check your version

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