CVE-2026-48846: Roundcube Webmail

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which may lead to information disclosure or access-control bypass.

Affected products

• Roundcube Webmail: from 1.6.0, before 1.6.16 (fixed in 1.6.16); from 1.7.0, before 1.7.1 (fixed in 1.7.1)

Published 2026-05-25. Last modified 2026-07-24.