CVE-2026-117860
Received Received - Intake

Same-origin policy bypass in Firefox DOM Navigation

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Same-origin policy bypass in the DOM: Navigation 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-2026-117860
EUVD
EUVD-2026-111031

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 the DOM Navigation component. The same-origin policy is a security feature that restricts how documents or scripts from one origin interact with resources from another origin. A bypass means attackers could potentially access or manipulate data across different origins, violating security boundaries.

Impact Analysis

If exploited, this vulnerability could allow attackers to steal sensitive data, perform unauthorized actions on behalf of users, or bypass security restrictions. Users of affected Firefox versions could be at risk of data breaches or account hijacking if the flaw is leveraged in an attack.

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 DOM Navigation component.

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