Race Condition in Chrome MHTML Enables High-Severity Data Leak

Publication date: 2026-04-28

Last updated on: 2026-04-30

Assigner: Chrome

Description

Race in MHTML in Google Chrome prior to 147.0.7727.138 allowed an attacker who convinced a user to install a malicious extension to leak cross-origin data via a crafted Chrome Extension. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-04-28

Last Modified

2026-04-30

Generated

2026-07-06

AI Q&A

2026-04-29

EPSS Evaluated

2026-07-05

NVD

CVE-2026-7351

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 147.0.7727.138 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This vulnerability is a race condition in the MHTML component of Google Chrome versions prior to 147.0.7727.138. It allows an attacker who convinces a user to install a malicious Chrome extension to leak data from other origins by exploiting this race condition.

Impact Analysis

If exploited, this vulnerability can lead to unauthorized leakage of cross-origin data. This means sensitive information from other websites or web applications that the user accesses could be exposed to the attacker through the malicious extension.

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