CVE-2026-32878

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Prior to 9.6.0-alpha.20 and 8.6.44, an attacker can bypass the default request keyword denylist protection and the class-level permission for adding fields by sending a crafted request that exploits prototype pollution in the deep copy mechanism. This allows injecting fields into class schemas that have field addition locked down, and can cause permanent schema type conflicts that cannot be resolved even with the master key. In 9.6.0-alpha.20 and 8.6.44, the vulnerable third-party deep copy library has been replaced with a built-in deep clone mechanism that handles prototype properties safely, allowing the existing denylist check to correctly detect and reject the prohibited keyword. No known workarounds are available."}, {"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 9.6.0-alpha.20 y 8.6.44, un atacante puede eludir la protecci\u00f3n predeterminada de la lista de denegaci\u00f3n de palabras clave de solicitud y el permiso a nivel de clase para a\u00f1adir campos enviando una solicitud manipulada que explota la contaminaci\u00f3n de prototipos en el mecanismo de copia profunda. Esto permite inyectar campos en esquemas de clase que tienen la adici\u00f3n de campos bloqueada, y puede causar conflictos permanentes de tipo de esquema que no pueden resolverse ni siquiera con la clave maestra. En 9.6.0-alpha.20 y 8.6.44, la biblioteca vulnerable de copia profunda de terceros ha sido reemplazada por un mecanismo de clonaci\u00f3n profunda incorporado que maneja las propiedades de prototipo de forma segura, permitiendo que la comprobaci\u00f3n de la lista de denegaci\u00f3n existente detecte y rechace correctamente la palabra clave prohibida. No se conocen soluciones alternativas disponibles."}], "id": "CVE-2026-32878", "lastModified": "2026-06-17T10:36:29.743", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "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": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32878", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-19T16:13:21.608209Z", "version": "2.0.3"}}]}, "published": "2026-03-18T22:16:25.510", "references": [{"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10200"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10201"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-9ccr-fpp6-78qf"}], "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.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.44)"}}], "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": "2026-03-19T18:24:48.052740+00:00", "value": {"mitigation_remediation": ["Upgrade parse-server to version 9.6.0\u2011alpha.20 or newer, or to 8.6.44 or newer to eliminate prototype pollution in the deep\u2011copy function.", "If an upgrade is not immediately possible, place the affected Parse Server instance behind a reverse proxy that validates request payloads against the deny\u2011list and monitor for abnormal schema changes.", "Plan and execute a phased upgrade path to move to a supported release as soon as feasible."], "summary": {"action": "Upgrade Server", "impact": "Schema Poisoning via Prototype Pollution"}, "threat_synthesis": {"affected_systems": "Affected systems are deployments of the parse-community:parse-server component that run any version before 9.6.0\u2011alpha.20 or 8.6.44. The CPE listing indicates that all alpha releases up to alpha19 and the earlier 8.x releases are vulnerable. Versions 9.6.0\u2011alpha.20+, 8.6.44+, or later fixes are not affected.", "description_and_impact": "Parse Server is an open\u2011source backend that can run on any Node.js infrastructure. Prior to the 9.6.0\u2011alpha.20 and 8.6.44 releases, a malicious request can exploit prototype pollution in the deep\u2011copy mechanism. By bypassing the default request keyword deny\u2011list protection, an attacker can inject disallowed fields into class schemas that are locked against field addition. The injected fields create permanent schema type conflicts that cannot be resolved even when using the master key. The underlying weakness is prototype pollution (CWE\u20111321) and the impact is a corruption of database schema definitions, potentially causing application failures and a loss of data integrity.", "risk_and_exploitability": "The CVSS v3 score is 5.3, which represents moderate severity, while the EPSS score is less than 1\u202f%, indicating a low likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog. It is inferred from the description that the attack vector is remote via a crafted HTTP request to the Parse Server API, as the prototype pollution is introduced through request processing. No known workarounds exist; the only remediation is upgrading to a fixed version."}}}}, "created": "2026-03-19T08:55:21.342122+00:00", "updated": "2026-03-25T11:52:03.959037+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"]}