CVE-2026-22601 is a high-severity vulnerability affecting OpenProject, an open-source web-based project management software. This vulnerability allows registered administrators to execute arbitrary commands by configuring the sendmail binary path and sending a test email. The issue is present in OpenProject versions 16.6.1 and below, and it has been patched in version 16.6.2. Organizations using affected versions should prioritize patching to mitigate potential risks.
With a CVSS score of 8.6, this vulnerability poses a significant threat. The attack vector is network-based, requiring high privileges, yet no user interaction is necessary for exploitation. The impacts on confidentiality, integrity, and availability are all rated high, emphasizing the urgent need for organizations to address this issue.
Currently, there are no known public exploits or proof of concept (PoC) available for this vulnerability. However, given its potential for exploitation, organizations should take proactive measures to ensure their systems are updated to the latest version to prevent any unauthorized command execution.
Organizations should prioritize patching immediately. The potential for exploitation, combined with the high severity of this vulnerability, makes it critical for defenders to act swiftly to mitigate associated risks.
Vulnerability Details
The vulnerability is described as allowing registered administrators to execute arbitrary commands through the misconfiguration of the sendmail binary path. This misconfiguration can lead to unauthorized command execution, posing a significant security risk. The CVSS score of 8.6 indicates a high severity level due to the potential impacts, including high confidentiality, integrity, and availability risks.
OpenProject version 16.6.1 and below are impacted. The vulnerability was published on January 10, 2026, and it has been categorized under CWE-77, which pertains to command injection vulnerabilities.
Technical Analysis
The root cause of this vulnerability lies in the improper configuration of the sendmail binary path within OpenProject. This misconfiguration allows high-privileged administrators to send crafted emails that can trigger arbitrary command execution on the server. The attack vector is network-based, meaning an attacker can exploit this vulnerability remotely.
With a low attack complexity, this vulnerability becomes a significant concern, especially since it requires high privileges but does not necessitate user interaction. The nature of the vulnerability leads to potential impacts on confidentiality, integrity, and availability, with a high impact rating for each.
Risk & Impact Analysis
Organizations using OpenProject should be aware of the risks associated with this vulnerability. The ability for an administrator to execute arbitrary commands can lead to severe security breaches, resulting in unauthorized access to sensitive data and potential system compromise. The blast radius could be extensive, impacting not just the affected OpenProject instance but also other connected systems depending on the configuration.
Given its high severity and the potential for exploitation, organizations should assess their deployment and prioritize remediation efforts. This includes updating to version 16.6.2 or later, where this vulnerability has been patched, and implementing security measures to prevent similar issues in the future.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of OpenProject prior to version 16.6.2 are affected by this vulnerability. Organizations should ensure they upgrade to version 16.6.2 or later to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize upgrading their OpenProject instances to version 16.6.2 as the primary mitigation strategy. If immediate patching is not possible, consider implementing workarounds such as disabling the email functionality or applying strict access controls to limit administrative privileges. Additionally, regular security assessments and penetration testing can help identify and address vulnerabilities in real-time.
For further information on security practices, organizations can refer to resources on penetration testing and effective security measures.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor for unusual email activity and any unauthorized command executions. Log indicators should include details about email configurations, particularly any changes to the sendmail binary path. Behavioral anomalies in server operations may also indicate attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2026-22601 highlights the critical importance of secure configurations in software applications. As organizations increasingly rely on web-based systems for project management, the potential for command injection vulnerabilities must be addressed diligently. This incident serves as a reminder for security teams to conduct regular security assessments and incorporate security training into their development processes.
Organizations should also consider investing in comprehensive security solutions. For detailed insights on building a robust security posture, refer to our guide on vulnerability management programs and best practices for application security.
Additionally, leveraging services such as red teaming can provide organizations with a deeper understanding of their security vulnerabilities and enhance their defensive strategies.
In conclusion, CVE-2026-22601 serves as a critical reminder of the importance of timely patching and the implementation of robust security practices to protect against potential exploitation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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