High (7.5). EPSS 9.6% chance of exploitation in the next 30 days.
External resources that should be blocked when loaded by SVG images can bypass security restrictions through the use of "data:" URLs. This could allow for cross-domain data leakage. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.
Severity
CVSS 3.0
7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
9.6% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-31)