CVE-2026-117965
Received Received - Intake

Firefox Address Bar Same-Origin Policy Bypass

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Same-origin policy bypass in the Address Bar component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117965
EUVD
EUVD-2026-110996

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a same-origin policy bypass in Firefox's Address Bar component. The same-origin policy is a security feature that prevents scripts from one website from accessing data from another website. A bypass here could allow malicious scripts to interact with or steal data from other sites.

Impact Analysis

If exploited, this vulnerability could allow attackers to access sensitive data from other websites you visit, such as cookies, session tokens, or personal information. This could lead to identity theft, unauthorized account access, or data breaches.

Mitigation Strategies

Update Firefox to version 159 or later and Firefox ESR to version 153.6 or later to address the same-origin policy bypass in the Address Bar component.

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