High (8.8). EPSS 7.8% chance of exploitation in the next 30 days.
A buffer overflow can occur when manipulating the SVG "animatedPathSegList" through script. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.7, Firefox ESR < 52.7, and Firefox < 59.
Severity
CVSS 3.0
8.8 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
7.8% chance of exploitation in the next 30 days; higher than 94% of CVEs (scores of 2026-10-31)