9.1
Critical
CVE-2026-4724 Undefined behavior in the Audio/Video component
Description
Undefined behavior in the Audio/Video component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 149 | earliest → < 149 | 149 |
| Thunderbird 149 | earliest → < 149 | 149 |
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