Roundcube Webmail up to 1.6.15/1.7.0 preg_replace sql injection

Summaryinfo

A vulnerability has been found in Roundcube Webmail up to 1.6.15/1.7.0 and classified as critical. Impacted is the function preg_replace. This manipulation causes sql injection. This vulnerability is tracked as CVE-2026-48842. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Roundcube Webmail up to 1.6.15/1.7.0 and classified as critical. Affected by this vulnerability is the function preg_replace. The manipulation with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at roundcube.net. This vulnerability is known as CVE-2026-48842 since 05/25/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1505 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 316809 (Linux Distros Unpatched Vulnerability : CVE-2026-48842), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.6.16 or 1.7.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (316809) and EUVD (EUVD-2026-31719). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Mail Client Software

Vendor

• Roundcube

Name

• Webmail

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15
• 1.7.0

License

• free

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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