Google Clasp up to 3.1.x Filenames path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in Google Clasp up to 3.1.x. Affected by this vulnerability is an unknown functionality of the component Filenames Handler. The manipulation results in path traversal. This vulnerability was named CVE-2026-4092. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Google Clasp up to 3.1.x. It has been classified as critical. Affected is an unknown functionality of the component Filenames Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Path Traversal in Clasp impacting versions < 3.2.0 allows a remote attacker to perform remote code execution via a malicious Google Apps Script project containing specially crafted filenames with directory traversal sequences.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-4092 since 03/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/13/2026). The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 3.2.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-12047). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Google

Name

• Clasp

Version

• 3.0
• 3.1

License

• free

Website

• Vendor: https://www.google.com/
• Product: https://github.com/google/clasp/

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Once again VulDB remains the best source for vulnerability data.

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