CVE-2026-35545: Roundcube Webmail

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15. The remote image blocking feature can be bypassed via SVG content in an e-mail message. This may lead to information disclosure or access-control bypass. This involves the animate element with attributeName=fill/filter/stroke.

Affected products

• Roundcube Webmail: before 1.5.15 (fixed in 1.5.15); from 1.6.0, before 1.6.15 (fixed in 1.6.15)

Published 2026-04-03. Last modified 2026-07-24.