CVE-2026-48849: XSS
Published May 25, 2026
·Updated
In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, an unsanitized subject field in the draft restored value could lead to stored XSS/HTML/CSS injection on shared mailboxes.
Affected Software
1 affected component
Roundcube Roundcube Webmail>=1.6.0<1.6.16, >=1.7.0<1.7.1
Event History
May 25, 2026
CVE Published
via MITRE·07:30 PM
Data Sourced
via MITRE·07:30 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What is the severity of CVE-2026-48849?
CVE-2026-48849 has a medium severity score of 4.4.
2
How do I fix CVE-2026-48849?
To fix CVE-2026-48849, upgrade to Roundcube Webmail version 1.6.16 or 1.7.1.
3
What type of vulnerability is CVE-2026-48849?
CVE-2026-48849 is an XSS vulnerability that allows for stored HTML/CSS injection.
4
What versions of Roundcube are affected by CVE-2026-48849?
CVE-2026-48849 affects Roundcube Webmail versions 1.6.x before 1.6.16 and 1.7.x before 1.7.1.
5
What can an attacker achieve with CVE-2026-48849?
An attacker can exploit CVE-2026-48849 to inject malicious scripts via the unsanitized subject field in shared mailboxes.