CVE-2025-9866
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-03

Last updated on: 2025-09-04

Assigner: Chrome

Description
Inappropriate implementation in Extensions in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Medium)
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Meta Information
Published
2025-09-03
Last Modified
2025-09-04
Generated
2026-06-16
AI Q&A
2025-09-03
EPSS Evaluated
2026-06-15
NVD
CVE-2025-9866
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
google chrome to 140.0.7339.80 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

This vulnerability is due to an inappropriate implementation in the Extensions feature of Google Chrome versions prior to 140.0.7339.80. It allows a remote attacker to bypass the content security policy by using a specially crafted HTML page.

Impact Analysis

The vulnerability can allow a remote attacker to bypass content security policies, potentially leading to unauthorized access or execution of malicious content. This can result in high impact on confidentiality, integrity, and availability of data or systems.

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