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openproject

OpenProject is an open-source, web-based project management software. For OpenProject version 16.6.1 and below, a registered administrator can execute arbitrary command by configuring sendmail binary path and sending a test email. This issue has been patched in version 16.6.2.

CVE-2026-22601 is a command injection vulnerability identified in OpenProject, an open-source web-based project management software widely used for collaborative project tracking and management. The flaw exists in versions 16.6.1 and earlier, where a registered administrator can exploit improper neutralization of special characters in the configuration of the sendmail binary path. By manipulating this configuration and triggering a test email, the attacker can execute arbitrary system commands with the privileges of the OpenProject application. This vulnerability is classified under CWE-77, indicating improper sanitization of inputs used in command execution contexts. The CVSS 4.0 base score is 8.6, reflecting a high severity due to network exploitability (AV:N), low attack complexity (AC:L), no user interaction (UI:N), and the requirement of high privileges (PR:H). The vulnerability impacts confidentiality, integrity, and availability as arbitrary commands can lead to data exfiltration, system manipulation, or denial of service. The issue was publicly disclosed on January 10, 2026, and patched in version 16.6.2. No public exploit code or active exploitation has been reported yet, but the presence of administrative access as a prerequisite means insider threats or compromised admin accounts could be leveraged. The vulnerability does not require user interaction, making automated exploitation feasible once admin access is obtained. The lack of sandboxing or command restrictions in the sendmail path configuration is the root cause. This vulnerability underscores the importance of input validation and secure configuration management in web applications handling system-level commands.

Detailed information about CVE-2026-22601: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in opf openproject affect

CVE-2026-22601: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in opf openproject - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-22601: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in opf openproject

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