CVE-2026-109772: Vulnerability in Mozilla Firefox
Description
Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a bypass of the same-origin policy within the DevTools component of Mozilla Firefox. The same-origin policy is a critical security mechanism that restricts how documents or scripts loaded from one origin can interact with resources from another origin. The flaw was addressed and fixed in Firefox 158.
Potential Impact
Exploitation of this vulnerability could allow an attacker to bypass the same-origin policy, potentially leading to unauthorized access to sensitive information or interaction with web content from different origins. However, no known exploits in the wild have been reported.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 158 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in Firefox 158.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:48:55.791Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"}]
Threat ID: 6ace2c4f2cdf04f65661d56f
Added to database: 10/13/2026, 13:04:15 UTC
Last enriched: 10/13/2026, 13:19:26 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 7
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