Use After Free in Google Chrome WebMCP

Publication date: 2026-07-23

Last updated on: 2026-07-23

Assigner: Chrome

Description

Use after free in WebMCP in Google Chrome prior to 150.0.7871.186 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-23

Last Modified

2026-07-23

Generated

2026-07-24

AI Q&A

2026-07-24

EPSS Evaluated

N/A

NVD

CVE-2026-16806

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 150.0.7871.186 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a use-after-free issue in WebMCP within Google Chrome. It allows a remote attacker to execute arbitrary code inside a sandbox by tricking a user into visiting a specially crafted HTML page. The issue exists in Chrome versions prior to 150.0.7871.186.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run malicious code on your device, potentially leading to data theft, installation of malware, or unauthorized access to your system. Since it occurs via a web page, simply visiting a malicious site could trigger the attack.

Mitigation Strategies

Update Google Chrome to version 150.0.7871.186 or later to address the use after free vulnerability in WebMCP.

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