CVE-2026-12317
High
Description
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mozilla Firefox
PublishedJun 16, 2026
First seenJun 16, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- mozilla firefox152.0.0 or later
- mozilla thunderbird152.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 152.0.0 | 152.0.0 |
| mozilla thunderbird | v < 152.0.0 | 152.0.0 |
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Choose the product and enter the version you run to see whether it falls in the affected range.
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