8.8
High
CVE-2026-2780 Privilege escalation in the Netmonitor component
Description
Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 148 | earliest → < 148 | 148 |
| Firefox 140.8 | earliest → < 140.8 | 140.8 |
| Thunderbird 148 | earliest → < 148 | 148 |
| Thunderbird 140.8 | earliest → < 140.8 | 140.8 |
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