CVE-2026-121251

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Missing Authorization Bypass in Google Chrome V8

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description

Missing authorization in V8 in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

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Meta Information

Published

2026-11-03

Last Modified

2026-11-03

Generated

2026-11-04

AI Q&A

2026-11-04

EPSS Evaluated

N/A

NVD

CVE-2026-121251

EUVD

EUVD-2026-116343

Affected Vendors & Products

Vendor	Product	Version / Range
Google	Chrome	157.0.8103.38

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 involves a missing authorization check in V8, the JavaScript engine used by Google Chrome. It allowed a remote attacker to bypass the web origin policy by tricking a user into visiting a specially crafted HTML page. This could enable unauthorized access to data or actions on other websites.

Impact Analysis

If exploited, this vulnerability could allow an attacker to access sensitive data from other websites you visit, perform unauthorized actions on your behalf, or steal cookies and session tokens. It may also lead to phishing attacks or further compromise of your browsing session.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations using affected Chrome versions may face compliance violations, legal penalties, or reputational damage.

Mitigation Strategies

Update Google Chrome to version 157.0.8103.38 or later to address the missing authorization issue in V8.

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