CVE-2026-109709: Vulnerability in Mozilla Firefox
Description
Information disclosure, privilege escalation in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves information disclosure and privilege escalation within the Security: Process Sandboxing component of Mozilla Firefox. It was resolved by Mozilla in Firefox 158 and Firefox ESR 153.5, as documented in their security advisories.
Potential Impact
Successful exploitation could lead to unauthorized information disclosure and escalation of privileges within the Firefox browser environment, potentially compromising user security and privacy.
Mitigation Recommendations
Users should update to Firefox 158 or later, or Firefox ESR 153.5 or later, where this vulnerability has been fixed. Applying these official updates fully mitigates the risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:18.217Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","vendor":"Mozilla"}]
Threat ID: 6ace2c402cdf04f65661caf6
Added to database: 10/13/2026, 13:04:00 UTC
Last enriched: 10/13/2026, 14:19:33 UTC
Last updated: 10/14/2026, 04:19:18 UTC
Views: 2
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