CVE-2026-39179: SOGo SQL Injection Vulnerability in Password Change Function

Technical summary

The vulnerability is a classic SQL injection (CWE-89) affecting SOGo's password change functionality. The newPassword parameter fails to properly sanitize or parameterize user input before passing it to SQL queries. An authenticated attacker can craft a malicious password string containing SQL metacharacters and syntax to break out of the intended query context and execute arbitrary SQL. The CVSS 3.1 score of 6.3 (Medium) reflects the requirement for prior authentication, but acknowledges confidentiality, integrity, and availability impacts are all feasible.

Business impact

Organizations relying on SOGo for mail, calendar, and collaboration services face potential data breaches through authenticated lateral movement. An employee or compromised account holder can access other users' information stored in the database, modify system data, or cause availability issues. For deployments with sensitive data or strict compliance requirements, this represents a meaningful risk even at the medium severity level due to the post-authentication nature of exploitation.

Affected systems

SOGo versions prior to 5.12.7 are affected. Organizations running SOGo should identify deployed versions immediately. The advisory does not specify whether earlier major versions (e.g., 5.11.x, 5.10.x) contain the same flaw; consult the vendor's security bulletin to determine your full patch scope.

Exploitability

The vulnerability requires an attacker to possess valid SOGo credentials, which significantly raises the barrier compared to unauthenticated exploits. However, once authenticated, exploitation is straightforward—no special techniques or bypasses are needed. In environments with weak account management, shared credentials, or compromised user accounts, this becomes a practical risk. The attack is reliably reproducible and does not depend on timing, race conditions, or environmental factors.

Remediation

Upgrade SOGo to version 5.12.7 or later. This update includes input validation and parameterized query fixes for the password change function. Organizations should test the upgrade in a staging environment first to ensure compatibility with existing configurations and integrations before rolling out to production.

Patch guidance

Apply SOGo 5.12.7 or a later patched version as soon as feasible within your change management process. Prioritize this if your SOGo instance is internet-facing or accessible to a large internal user population. Verify the patch version through the official SOGo release notes or your distribution channel. If you maintain custom authentication or password-change integrations, confirm they remain functional after patching.

Detection guidance

Review SOGo access logs and database query logs for unusual SQL syntax or errors in password-change requests, particularly those containing quotes, semicolons, or SQL keywords in the password field. Monitor for failed database queries or exceptions occurring during user password changes. If you have a SIEM, correlate failed authentication attempts with subsequent successful logins using previously-compromised accounts. Check for any data exfiltration indicators or unexpected database modifications around the time frames of potential exploitation.

Why prioritize this

Although SOGo is not yet on CISA's KEV catalog, the post-authentication SQL injection is a classic privilege-escalation path. Organizations should treat this as moderate-to-high priority based on their own risk profile: internet-facing SOGo instances or those with high user populations warrant faster patching. Less critical internal deployments with strong access controls can follow a standard patching cycle, but should not be deferred indefinitely.

Risk score, explained

The CVSS 6.3 (Medium) rating appropriately reflects the authentication requirement (reducing attack likelihood), while acknowledging that confidentiality, integrity, and availability impacts are all possible once exploitation occurs. The score does not account for organizational factors—your actual risk may be higher if users have broad database access or if SOGo is critical to business operations. Conversely, if your deployment is tightly segmented and password changes are infrequent, your operational risk may be lower.

Frequently asked questions