CVE-2026-12027 Security feature bypass in Chrome

Critical 9.6 Published 11 Jun 2026 Updated 12 Jun 2026

A remote attacker with compromised renderer access can escape the Chrome sandbox via a crafted HTML page, requiring an upgrade to mitigate.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-12027?

CVE-2026-12027 is a critical vulnerability in Google Chrome, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Inappropriate implementation in Headless in Google Chrome prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

Weakness: CWE-693, CWE-250

Which versions are affected by CVE-2026-12027?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-12027?

Upgrade to a fixed version.

Is CVE-2026-12027 being exploited?

There is no known exploitation of CVE-2026-12027 in the wild and no public exploit code.

All Google Chrome vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-12027, ECHO-8cc7-f811-2619, GHSA-88g6-23mm-rpg4, MINI-37pw-gm29-xqhc.