ServiceWorker UXSS in Google Chrome

Publication date: 2026-05-06

Last updated on: 2026-05-07

Assigner: Chrome

Description

Inappropriate implementation in ServiceWorker in Google Chrome prior to 148.0.7778.96 allowed an attacker who convinced a user to install a malicious extension to inject arbitrary scripts or HTML (UXSS) via a crafted Chrome Extension. (Chromium security severity: Medium)

CVSS Scores

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Meta Information

Published

2026-05-06

Last Modified

2026-05-07

Generated

2026-07-06

AI Q&A

2026-05-06

EPSS Evaluated

2026-07-05

NVD

CVE-2026-7958

EUVD

EUVD-2026-28019

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 148.0.7778.96 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is an inappropriate implementation in the ServiceWorker component of Google Chrome versions prior to 148.0.7778.96. It allows an attacker who convinces a user to install a malicious Chrome extension to inject arbitrary scripts or HTML content. This type of attack is known as UXSS (Universal Cross-Site Scripting).

Impact Analysis

If exploited, this vulnerability can allow an attacker to execute arbitrary scripts or inject HTML in the context of the browser. This can lead to unauthorized actions, data theft, or manipulation of web content viewed by the user.

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