CVE-2026-106253

Analyzed Analyzed - Analysis Complete

Incorrect Authorization in Google Chrome Extensions

Publication date: 2026-10-06

Last updated on: 2026-10-07

Assigner: Chrome

Description

Incorrect authorization in Extensions in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to obtain cross-origin data via a crafted Chrome extension. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-06

Last Modified

2026-10-07

Generated

2026-10-19

AI Q&A

2026-10-06

EPSS Evaluated

2026-10-18

NVD

CVE-2026-106253

EUVD

EUVD-2026-93707

Affected Vendors & Products

Vendor	Product	Version / Range
google	chrome	to 155.0.8059.39 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability involves incorrect authorization in Google Chrome's Extensions feature. A remote attacker could exploit it by creating a specially crafted Chrome extension to bypass security controls and access cross-origin data, meaning data from other websites or domains.

Detection Guidance

This vulnerability involves incorrect authorization in Google Chrome extensions. Detection requires checking installed extensions for unauthorized cross-origin data access. Review Chrome's extension permissions and audit installed extensions for suspicious activity. No specific commands are provided in the CVE details.

Impact Analysis

If you use Google Chrome with vulnerable extensions, an attacker might steal sensitive data from other websites you visit. This could include personal information, login credentials, or other confidential data accessed during your browsing sessions.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating GDPR's data protection principles or HIPAA's safeguards for protected health information. Organizations may face compliance breaches if user data is compromised through this flaw.

Mitigation Strategies

Update Google Chrome to version 155.0.8059.39 or later to address the incorrect authorization issue in Extensions.

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