Remote code execution via unchecked project filenames
Published Mar 13, 2026 · Updated Mar 13, 2026
Path traversal in Google clasp before 3.2.0 allows remote attackers to execute code through a malicious Apps Script project. Files.fetchRemote resolves each server-supplied filename beneath contentDir and returns the resulting local path without verifying that it remains inside that directory. A developer must clone or pull an attacker-controlled or modified project; traversal sequences can overwrite files outside the project and place code for later execution.
Summary
What happened
Path traversal in Google clasp before 3.2.0 allows remote attackers to execute code through a malicious Apps Script project. Files.fetchRemote resolves each server-supplied filename beneath contentDir and returns the resulting local path without verifying that it remains inside that directory. A developer must clone or pull an attacker-controlled or modified project; traversal sequences can overwrite files outside the project and place code for later execution.
The record
- CVE
- CVE-2026-4092
- Published
- Mar 13, 2026
- Updated
- Mar 13, 2026
- Vendor
- Go standard library
- Product
- clasp
- Classifications
- CWE-22, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 13, 2026CVE publishedPublication date reported by the CVE source.
- Mar 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 3.2.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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