CVE-2026-121088
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Missing Authorization in Google Chrome PerformanceAPIs

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: Chrome

Description
Missing authorization in PerformanceAPIs in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

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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-2026-121088
EUVD
EUVD-2026-116479

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Google Chrome 157.0.8103.38

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Exploitability

CWE
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KEV
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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.

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Executive Summary

This vulnerability involves missing authorization checks in PerformanceAPIs within Google Chrome versions before 157.0.8103.38. An attacker could exploit this by crafting a malicious HTML page to access cross-origin data without proper permissions.

Impact Analysis

If exploited, this vulnerability could allow a remote attacker to steal sensitive data from other websites you visit, potentially exposing personal information, login credentials, or other confidential data.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating GDPR's data protection principles and HIPAA's security rules for protected health information. Organizations may face compliance breaches and legal penalties if exploited.

Mitigation Strategies

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

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