CVE-2026-91709

Received Received - Intake

Type Confusion in Google Chrome ServiceWorker

Publication date: 2026-09-15

Last updated on: 2026-09-16

Assigner: Chrome

Description

Type confusion in ServiceWorker in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-15

Last Modified

2026-09-16

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-91709

EUVD

EUVD-2026-79970

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 153.0.8010.47 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-843	The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

Attack-Flow Graph

Executive Summary

This vulnerability is a type confusion issue in Google Chrome's ServiceWorker component. It allows a remote attacker to execute arbitrary code within the browser's sandbox by tricking a user into visiting a specially crafted HTML page. The issue exists in Chrome versions prior to 153.0.8010.47.

Impact Analysis

This vulnerability could allow an attacker to run malicious code on your device if you visit a compromised website. It may lead to unauthorized access to sensitive data, installation of malware, or other malicious activities within the browser sandbox.

Mitigation Strategies

Update Google Chrome to version 153.0.8010.47 or later to address the type confusion vulnerability in ServiceWorker.

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