SQL injection in Roundcube Webmail - CVE-2026-48842
Published: May 25, 2026 / Updated: September 25, 2026
Vulnerability identifier: #VU132214
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-48842
CWE-ID: CWE-89
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute unauthorized SQL queries.
The vulnerability exists due to SQL injection in the virtuser_query plugin when processing input through preg_replace backslash escape handling. A remote non-authenticated attacker can send specially crafted input to execute unauthorized SQL queries.
Affected software
Roundcube Webmail
Debian Linux
roundcube (Debian package)
Debian Linux
roundcube (Debian package)
How to mitigate CVE-2026-48842
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