CVE-2026-92061
Critical
Description
Incorrect boundary conditions in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Mozilla Firefox
PublishedSep 15, 2026
First seenSep 15, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- mozilla firefox156.0.0 or later
- mozilla thunderbird156.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 156.0.0 | 156.0.0 |
| mozilla thunderbird | v < 156.0 | 156.0 |
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