Insufficient Policy Enforcement in Service Worker in Google Chrome

Publication date: 2026-05-20

Last updated on: 2026-05-21

Assigner: Chrome

Description

Insufficient policy enforcement in Service Worker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-05-20

Last Modified

2026-05-21

Generated

2026-06-30

AI Q&A

2026-05-20

EPSS Evaluated

2026-06-28

NVD

CVE-2026-9115

EUVD

EUVD-2026-31161

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 148.0.7778.179 (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.

Attack-Flow Graph

Executive Summary

This vulnerability is an insufficient policy enforcement issue in the Service Worker component of Google Chrome versions prior to 148.0.7778.179. It allows a remote attacker to bypass the same origin policy by using a specially crafted HTML page.

Impact Analysis

An attacker exploiting this vulnerability could bypass the same origin policy, potentially allowing them to access or interact with resources from other origins that should be restricted. This could lead to unauthorized access to sensitive information or actions within the browser context.

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