CVE-2026-48842: Roundcube Webmail

High severity, CVSS 8.1. EPSS: 0.9% chance of exploitation in the next 30 days.

Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1 has Pre-authentication SQL injection in the virtuser_query plugin via a preg_replace() backslash escape 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 2026-09-25.