CVE-2026-32886

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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 c\u00f3digo 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 funci\u00f3n en la nube con un nombre de funci\u00f3n manipulado que atraviesa la cadena de prototipos de JavaScript de un gestor de funci\u00f3n en la nube registrado, causando un desbordamiento de pila. La correcci\u00f3n en las versiones 9.6.0-alpha.24 y 8.6.47 restringe las b\u00fasquedas de propiedades durante la resoluci\u00f3n 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 soluci\u00f3n alternativa conocida."}], "id": "CVE-2026-32886", "lastModified": "2026-06-17T10:36:30.647", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32886", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-19T16:18:19.353642Z", "version": "2.0.3"}}]}, "published": "2026-03-18T22:16:25.663", "references": [{"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10210"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10211"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-4263-jgmp-7pf4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0-alpha.24)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.47)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "parse-server", "source": "cna", "vendor": "parse-community"}, "product": "parse_server", "vendor": "parse_community"}], "analysis": {"en": {"generated_at": "2026-03-19T18:24:31.922899+00:00", "value": {"mitigation_remediation": ["Upgrade Parse Server to version 9.6.0\u2011alpha.24 or later, or 8.6.47 or later, which restricts property lookups during cloud function name resolution.", "Verify that the upgrade has succeeded by confirming the server starts without crashing on dummy function calls.", "Restrict network access to the cloud\u2011function API to trusted hosts or IP ranges via firewall or ingress rules to reduce exposure.", "Monitor application logs for repeated invalid function name attempts and investigate anomalous activity."], "summary": {"action": "Patch Immediately", "impact": "Denial of Service (server crash)"}, "threat_synthesis": {"affected_systems": "The vulnerability affects parse-community:parse-server on all releases prior to version 9.6.0\u2011alpha.24 and 8.6.47. Any deployment of Parse Server that is running one of the listed CPEs (e.g., 9.6.0\u2011alpha.1 through alpha.23, 8.6.x prior to 8.6.47, or any of the alpha pre\u2011releases in the provided list) is susceptible. These installations can be hosted on any infrastructure that can run Node.js.", "description_and_impact": "Parse Server, an open\u2011source Node.js backend, has a flaw that lets a remote caller crash the server process. By sending a cloud function request with a crafted function name that walks up the JavaScript prototype chain of the registered cloud\u2011function handlers, the code triggers a stack overflow, causing the server to terminate unexpectedly. This condition maps to the prototype chain traversal weakness (CWE\u20111321) and results in a denial\u2011of\u2011service impact.", "risk_and_exploitability": "The CVSS score of 8.2 classifies this as a high\u2011severity vulnerability, while the EPSS score of less than 1% indicates a low probability of active exploitation today. It is not included in the CISA KEV catalog. The attack vector is remote: a client can trigger the crash by invoking the cloud\u2011function endpoint with an inappropriate function name. Consequently, while the impact on availability is substantial, the overall current risk level may be moderate due to the low exploitation likelihood, but the lack of a workaround makes timely patching essential."}}}}, "created": "2026-03-19T08:55:20.273740+00:00", "updated": "2026-03-25T11:52:02.954323+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"]}