Roundcube · Roundcube Webmail · CVE-2026-35539
Name of the Vulnerable Software and Affected Versions
Roundcube Webmail versions prior to 1.5.14 and prior to 1.6.14
Description
A flaw exists in Roundcube Webmail that allows for cross-site scripting (XSS). This occurs due to inadequate sanitization of HTML attachments when previewed. An attacker can exploit this by having a victim preview a specially crafted text/html attachment.
Recommendations
Update Roundcube Webmail to version 1.5.14 or later.
Update Roundcube Webmail to version 1.6.14 or later.