CVE-2025-10527
High
Description
Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Mozilla Firefox
PublishedSep 16, 2025
First seenSep 16, 2025
Weakness typeCWE-416Use after free
How to fix
Update
- mozilla firefox140.3.0 or later
- mozilla thunderbird140.3.0, 143.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 140.3.0, v ≤ 143.0 | 140.3.0 |
| mozilla thunderbird | v < 140.3.0, 141.0 ≤ v < 143.0 | 140.3.0, 143.0 |
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