CVE-2026-16398
Received Received - Intake

Graphics Component Site Isolation Vulnerability in Firefox

Publication date: 2026-07-21

Last updated on: 2026-07-21

Assigner: Mozilla Corporation

Description
Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 153.

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Meta Information

Published
2026-07-21
Last Modified
2026-07-21
Generated
2026-07-21
AI Q&A
2026-07-21
EPSS Evaluated
N/A
NVD
CVE-2026-16398
EUVD
EUVD-2026-46236

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 153

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a site isolation issue in Firefox's Graphics component. Site isolation is a security feature that separates content from different websites to prevent malicious sites from accessing data from other sites. A flaw in this feature could allow unauthorized access or data leakage between sites.

Impact Analysis

If exploited, this vulnerability could allow an attacker to access sensitive data from other websites you have open in your browser, such as login credentials, personal information, or financial details. It may also enable cross-site scripting attacks or data theft.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating privacy requirements under GDPR and HIPAA. Organizations using affected Firefox versions may face compliance violations, legal penalties, and reputational damage if user data is compromised.

Mitigation Strategies

Update Firefox to version 153 or later to address the graphics component site isolation issue.

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