CVE-2016-9900: Debian Linux

High severity, CVSS 7.5. EPSS: 9.8% 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.

Affected products

• Debian Debian Linux: version 9.0 only
• Mozilla Firefox: before 50.1 (fixed in 50.1); before 45.6.0 (fixed in 45.6.0)
• Mozilla Thunderbird: before 45.6.0 (fixed in 45.6.0)
• Red Hat Enterprise Linux: version 5.0 only; version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Desktop: version 5.0 only; version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 5.0 only; version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.3 only; version 7.4 only
• Red Hat Enterprise Linux Server Eus: version 7.3 only; version 7.4 only; version 7.5 only
• Red Hat Enterprise Linux Workstation: version 5.0 only; version 6.0 only; version 7.0 only

Published 2018-06-11. Last modified 2026-06-17.