Pre-authentication SQL Injection Vulnerability in Roundcube Webmail by Roundcube

CVE-2026-48842

What is CVE-2026-48842?

CVE-2026-48842 is a security vulnerability found in Roundcube Webmail, an open-source webmail software used widely for email management. The flaw exists specifically in the virtuser_query plugin and is characterized as a pre-authentication SQL injection vulnerability. When exploited, this vulnerability allows an attacker to manipulate SQL queries in a way that can compromise the database without needing to authenticate. This poses a significant security risk as it could lead to unauthorized access to sensitive data, data integrity issues, and even complete compromise of the webmail application. The versions affected are Roundcube Webmail versions 1.6.x prior to 1.6.16 and 1.7.x before 1.7.1.

Potential Impact of CVE-2026-48842

1. Unauthorized Database Access: The SQL injection vulnerability permits attackers to execute arbitrary SQL commands, potentially allowing them to extract sensitive user information or even alter data without needing valid credentials.

2. Data Integrity Compromise: By manipulating SQL queries, an attacker can insert, update, or delete records in the database, leading to corrupted data and loss of trustworthiness in the webmail service.

3. Wider System Compromise: Given the nature of SQL injection vulnerabilities, successful exploitation could serve as a stepping stone for further attacks on the server, leading to broader network access, including the potential installation of malicious software or ransomware campaigns.

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