CVE-2026-48842: 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

High severity · published May 25, 2026

CVE-2026-48842

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

8.1

CVSS

1.7%

EPSS

On KEV

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

High

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.7% · higher than 77% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Webmail · Roundcube

1.6.0 before 1.6.16; 1.7.0 before 1.7.1 · source: vendor

In the news

VulnerabilityHigh

Roundcube SQL injection CVE-2026-48842 is now being exploited in the wild

Roundcube SQL injection CVE-2026-48842 is now being exploited in the wild, putting unpatched webmail servers at risk of database compromise. A Roundcube Webmail vulnerability, tracked as CVE-2026-48842 (CVSS score of 8.1) and patched four months ago, is now being exploited in the wild. The Canadian Centre for Cyber Security added the warning to its advisory […]

CVE-2026-48842

Sep 28, 2026·Security Affairs

Affected product

Webmail

Roundcube

All Webmail CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-48842

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-48842

github.com