CVE-2026-3889
Medium
Description
Spoofing issue in Thunderbird. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mozilla Thunderbird
PublishedMar 24, 2026
First seenMar 24, 2026
Weakness typeCWE-451CWE-451
How to fix
Update
- mozilla thunderbird140.9.0, 149.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla thunderbird | v < 140.9.0, v < 149.0 | 140.9.0, 149.0 |
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