8.8
High
CVE-2026-100832 Use-after-free in the Graphics: Canvas2D component
Description
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 140.17, Thunderbird 153.4, Firefox ESR 115.42, and Firefox ESR 140.17.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 153.4 | earliest → < 153.4 | 153.4 |
| Firefox 140.17 | earliest → < 140.17 | 140.17 |
| Firefox 115.42 | earliest → < 115.42 | 115.42 |
| Thunderbird 153.4 | earliest → < 153.4 | 153.4 |
| Thunderbird 140.17 | earliest → < 140.17 | 140.17 |