7.5
High
CVE-2026-4686 Incorrect boundary conditions in the Graphics: Canvas2D component
Description
Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 149 | earliest → < 149 | 149 |
| Firefox 140.9 | earliest → < 140.9 | 140.9 |
| Firefox 115.34 | earliest → < 115.34 | 115.34 |
| Thunderbird 149 | earliest → < 149 | 149 |
| Thunderbird 140.9 | earliest → < 140.9 | 140.9 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Versions not published | |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Versions not published | |
| Red Hat Enterprise Linux AppStream (v. 10) | Versions not published | |
| Red Hat Enterprise Linux AppStream (v. 8) | Versions not published |