CVE-2026-4092 is a path traversal vulnerability classified under CWE-22 affecting Google Clasp, a command-line tool used to develop and manage Google Apps Script projects. Versions prior to 3.2.0 do not properly restrict pathname inputs, allowing attackers to craft filenames containing directory traversal sequences (e.g., ../) within malicious Google Apps Script projects. When such a project is processed by Clasp, the traversal sequences enable the attacker to escape the intended directory boundaries and write or execute files in unauthorized locations. This flaw can be exploited remotely without requiring authentication or elevated privileges, but it requires user interaction to trigger the processing of the malicious project. Successful exploitation leads to remote code execution (RCE), compromising the confidentiality, integrity, and availability of the affected system. The CVSS 4.0 base score of 8.7 reflects the high impact and ease of exploitation. Although no public exploits have been reported yet, the vulnerability is critical due to the potential for full system compromise in environments where Clasp is used to manage scripts. The vulnerability was publicly disclosed on March 13, 2026, and no official patches or mitigations have been linked yet, emphasizing the urgency for users to upgrade once available or apply interim controls.

The impact of CVE-2026-4092 is significant for organizations relying on Google Clasp for managing Google Apps Script projects. Successful exploitation allows remote attackers to execute arbitrary code on the victim’s system, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, disruption of business processes, and deployment of further malware or ransomware. Since Clasp is commonly used by developers and enterprises integrating with Google Workspace, the vulnerability could be leveraged to target a wide range of organizations including technology companies, educational institutions, and government agencies. The ease of exploitation without authentication and the high privileges that could be gained make this a critical threat. Additionally, compromised developer environments could be used as a pivot point for supply chain attacks or to inject malicious scripts into production environments, amplifying the damage.

To mitigate CVE-2026-4092, organizations should immediately upgrade Google Clasp to version 3.2.0 or later once available. Until patches are released, restrict the use of Clasp to trusted users and environments only. Implement strict input validation and sanitization for all filenames and project files processed by Clasp to prevent directory traversal sequences. Employ application whitelisting and endpoint protection solutions to detect and block unauthorized code execution attempts. Monitor logs for unusual file system access patterns or unexpected script deployments. Educate developers and administrators about the risks of processing untrusted Google Apps Script projects. Consider isolating development environments to limit the blast radius of potential exploitation. Regularly audit and review permissions granted to Clasp and related tools to minimize exposure.