CVE-2026-35543: Roundcube Webmail

Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via SVG content (with animate attributes) in an e-mail message. This may lead to information disclosure or access-control bypass.

Affected products

• Roundcube Webmail: before 1.5.14 (fixed in 1.5.14); from 1.6.0, before 1.6.14 (fixed in 1.6.14)

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