CVE-2026-118015
High
Description
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Firefox
PublishedOct 27, 2026
First seenOct 27, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- Mozilla Firefox159 or later
- Mozilla Thunderbird159 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Mozilla Firefox | No range specified | 159 |
| Mozilla Thunderbird | No range specified | 159 |
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