CVE-2026-92042
High
Description
Race condition in the DOM: Content Processes component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mozilla Firefox
PublishedSep 15, 2026
First seenSep 15, 2026
Weakness typeCWE-362Race condition
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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