CVE-2026-106289

Analyzed Analyzed - Analysis Complete

Missing Authorization in FedCM in Google Chrome

Publication date: 2026-10-06

Last updated on: 2026-10-09

Assigner: Chrome

Description

Missing authorization in FedCM in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-06

Last Modified

2026-10-09

Generated

2026-10-19

AI Q&A

2026-10-06

EPSS Evaluated

2026-10-18

NVD

CVE-2026-106289

EUVD

EUVD-2026-93730

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability is a missing authorization issue in FedCM (Federated Credential Management) in Google Chrome versions prior to 155.0.8059.39. It allows a remote attacker to bypass the web origin policy by tricking a user into visiting a crafted HTML page. The severity is rated as Medium by Chromium security team.

Detection Guidance

This vulnerability involves missing authorization in FedCM in Google Chrome. Detection requires checking the Chrome version and verifying if it is prior to 155.0.8059.39. Use the command 'google-chrome --version' or check 'chrome://settings/help' in the browser to confirm the version.

Impact Analysis

This vulnerability could allow an attacker to access sensitive user data or perform actions on behalf of the user without proper authorization. It may lead to unauthorized access to accounts or data if exploited through a malicious webpage.

Compliance Impact

This vulnerability allows unauthorized access to web origin policies, which could lead to unauthorized data exposure or manipulation. This may impact compliance with GDPR by potentially violating data protection principles and HIPAA by risking unauthorized access to protected health information.

Mitigation Strategies

Update Google Chrome to version 155.0.8059.39 or later to address the missing authorization issue in FedCM.

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