CVE-2026-109714
Medium
Description
Incorrect boundary conditions in the Layout component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
SeverityMedium
CVSS5.4
Exploit probability—
ProductFirefox
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- Firefox158 or later
- Thunderbird158 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox | No range specified | 158 |
| Thunderbird | No range specified | 158 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
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