CVE-2026-4092 is a path traversal vulnerability categorized 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., '../') that escape the intended directory boundaries. This flaw enables remote attackers to upload or manipulate files outside the designated directories, leading to remote code execution (RCE) when the malicious Apps Script project is processed. The vulnerability requires no authentication or privileges but does require user interaction, such as opening or deploying the malicious project. The CVSS 4.0 score of 8.7 reflects the high impact on confidentiality, integrity, and availability, combined with the ease of exploitation over the network. Although no public exploits have been reported yet, the potential for attackers to execute arbitrary code remotely poses a severe threat to organizations relying on Clasp for Apps Script development and deployment. The vulnerability could be exploited to compromise developer machines, inject malicious scripts into production environments, or pivot to other internal systems. The lack of patch links suggests that a fix may be pending or recently released, emphasizing the need for vigilance and prompt updates. Proper input validation, path sanitization, and strict file system access controls are critical to mitigating this issue.

The impact of CVE-2026-4092 is significant for organizations worldwide that use Google Clasp for managing Google Apps Script projects. Successful exploitation can lead to remote code execution on developer machines or build environments, compromising the confidentiality, integrity, and availability of development assets. Attackers could inject malicious code into Apps Script projects, potentially affecting downstream applications and services that rely on these scripts, including automation workflows, internal tools, and cloud resources. This could result in data breaches, unauthorized access, service disruptions, and lateral movement within corporate networks. Since Clasp is widely used in enterprises leveraging Google Workspace, the vulnerability could affect a broad range of sectors including technology, finance, education, and government. The ease of exploitation without authentication and the high privileges often associated with development environments exacerbate the risk. Additionally, compromised scripts could be used to target end users or escalate attacks within cloud ecosystems. The absence of known exploits in the wild currently provides a window for remediation, but the potential damage warrants immediate action.

To mitigate CVE-2026-4092, organizations should immediately upgrade Google Clasp to version 3.2.0 or later once available. Until patched, restrict access to Clasp and related development environments to trusted users and networks only. Implement rigorous input validation and sanitization for all filenames and project files to prevent directory traversal sequences. Employ file system access controls and sandboxing to limit the impact of any unauthorized file operations. Monitor logs and audit trails for unusual file path manipulations or unexpected project uploads. Educate developers about the risks of opening untrusted Apps Script projects and encourage the use of secure coding practices. Consider deploying endpoint protection solutions that can detect suspicious file system activities. Additionally, review and harden deployment pipelines to prevent malicious script injection. Coordinate with Google Workspace administrators to enforce security policies and monitor for anomalous behavior related to Apps Script projects. Finally, maintain an incident response plan tailored to development environment compromises.