Vulnerability in Mozilla Firefox
CVE-2026-4720
Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited…
EPSS: 0.000 (7.7th percentile) — read the EPSS interpretation.
Affected products
- Mozilla Firefox — versions 140.9, 149
- Mozilla Thunderbird — versions 140.9, 149