Cross-site scripting in Roundcube Webmail - CVE-2026-48849
Published: May 25, 2026 / Updated: September 25, 2026
Vulnerability identifier: #VU132212
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-48849
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to inject arbitrary script or style content.
The vulnerability exists due to stored cross-site scripting in the subject field of the draft restore dialog when rendering restored draft data. A remote user can save a specially crafted draft subject to inject arbitrary script or style content.
Affected software
Roundcube Webmail
Debian Linux
roundcube (Debian package)
Debian Linux
roundcube (Debian package)
How to mitigate CVE-2026-48849
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.16, 1.7.1
roundcube (Debian package) - addressed in versions 1.6.5+dfsg-1+deb12u9, 1.6.16+dfsg-0+deb13u1
roundcube (Debian package) - addressed in versions 1.6.5+dfsg-1+deb12u9, 1.6.16+dfsg-0+deb13u1