CVE-2025-11719
Critical
Description
Starting in Thunderbird 143, the use of the native messaging API by web extensions on Windows could lead to crashes caused by use-after-free memory corruption. This vulnerability was fixed in Firefox 144 and Thunderbird 144.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Mozilla Firefox
PublishedOct 14, 2025
First seenOct 14, 2025
Weakness typeCWE-416Use after free
How to fix
Update
- mozilla firefox144.0 or later
- mozilla thunderbird144.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | 143.0 ≤ v < 144.0 | 144.0 |
| mozilla thunderbird | 143.0 ≤ v < 144.0 | 144.0 |
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