CVE-2026-92039
Medium
Description
Mitigation bypass in the DOM: Notifications component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
SeverityMedium
CVSS6.3
Exploit probability—
Product
Mozilla Firefox
PublishedSep 15, 2026
First seenSep 15, 2026
Weakness typeCWE-693CWE-693
How to fix
Update
- mozilla firefox153.3.0, 156.0.0 or later
- mozilla thunderbird153.3.0, 156.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 153.3.0, 154.0.0 ≤ v < 156.0.0 | 153.3.0, 156.0.0 |
| mozilla thunderbird | v < 153.3.0, 154.0 ≤ v < 156.0 | 153.3.0, 156.0 |
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