9.8
Critical
CVE-2026-8956 Integer overflow in the Networking: JAR component
Description
Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 151 | earliest → < 151 | 151 |
| Firefox 140.11 | earliest → < 140.11 | 140.11 |
| Thunderbird 151 | earliest → < 151 | 151 |
| Thunderbird 140.11 | earliest → < 140.11 | 140.11 |
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