CVE-2026-0889
High
Description
Denial-of-service in the DOM: Service Workers component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mozilla Firefox
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- mozilla firefox147.0 or later
- mozilla thunderbird147.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 147.0 | 147.0 |
| mozilla thunderbird | v < 147.0 | 147.0 |
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