Headless Sandbox Escape in Google Chrome

Publication date: 2026-06-11

Last updated on: 2026-06-23

Assigner: Chrome

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)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-11

Last Modified

2026-06-23

Generated

2026-07-02

AI Q&A

2026-06-12

EPSS Evaluated

2026-07-01

NVD

CVE-2026-12027

EUVD

EUVD-2026-36347

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 149.0.7827.115 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
CWE-250	The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.

Attack-Flow Graph

Executive Summary

This vulnerability is an inappropriate implementation in the Headless mode of Google Chrome versions prior to 149.0.7827.115. It allows a remote attacker who has already compromised the renderer process to potentially escape the browser's sandbox by using a specially crafted HTML page.

Impact Analysis

If exploited, this vulnerability could allow an attacker to break out of the sandbox environment that normally restricts the renderer process. This could lead to the attacker gaining higher privileges on the system, potentially allowing them to execute arbitrary code or access sensitive information beyond the browser.

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