CVE-2026-33498

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open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.55 and 9.6.0-alpha.44, an attacker can send an unauthenticated HTTP request with a deeply nested query containing logical operators to permanently hang the Parse Server process. The server becomes completely unresponsive and must be manually restarted. This is a bypass of the fix for CVE-2026-32944. This issue has been patched in versions 8.6.55 and 9.6.0-alpha.44."}, {"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 8.6.55 y 9.6.0-alpha.44, un atacante puede enviar una solicitud HTTP no autenticada con una consulta profundamente anidada que contenga operadores l\u00f3gicos para colgar permanentemente el proceso de Parse Server. El servidor se vuelve completamente inoperable y debe ser reiniciado manualmente. Esto es un bypass de la correcci\u00f3n para CVE-2026-32944. Este problema ha sido parcheado en las versiones 8.6.55 y 9.6.0-alpha.44."}], "id": "CVE-2026-33498", "lastModified": "2026-06-17T10:37:36.267", "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": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "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:N/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-2026-33498", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-26T19:32:52.995225Z", "version": "2.0.3"}}]}, "published": "2026-03-24T19:16:54.057", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/2581b5426047ce9cbcd3d9c0e8379e9c30e23ab5"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/85994eff9e7b34cac7e1a2f5791985022a1461d1"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10257"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10258"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-9fjp-q3c4-6w3j"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-674"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.55)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0-alpha.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": "2026-03-25T22:51:21.186506+00:00", "value": {"mitigation_remediation": ["Apply the patch that introduces version 8.6.55 or later for the 8.x line", "Apply the patch that introduces version 9.6.0\u2011alpha.44 or later for the 9.x line", "Verify that your Parse Server instance is running a non\u2011vulnerable release before restarting or redeploying", "If upgrade is not feasible, monitor API traffic for unusually deep query structures and consider temporarily blocking requests that exceed a safe depth threshold", "Ensure the deployment environment is patched regularly and that no legacy versions remain in production"], "summary": {"action": "Immediate Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability impacts the open\u2011source Parse Platform. Specifically, any deployment of parse\u2011server before version 8.6.55 or before 9.6.0\u2011alpha.44 is affected. Users running older 8.x or 9.x releases on Node.js environments are susceptible. The vulnerability applies to all editions of the product, regardless of configuration, as the trigger is an unauthenticated HTTP request.", "description_and_impact": "An attacker can send an unauthenticated HTTP request containing a deeply nested query with logical operators to the Parse Server API. The malformed query bypasses the pre\u2011validation transform pipeline, causing the server to enter a permanent hang state. The Parse Server process becomes unresponsive and must be manually restarted, resulting in a complete service outage. This vulnerability is a direct bypass of a previous fix (CVE-2026-32944) and therefore represents a critical availability flaw.", "risk_and_exploitability": "The CVSS score of 8.7 indicates a high severity due to the impact on availability and the lack of authentication required. The EPSS score of less than 1% suggests that, while the exploit probability is low, the vulnerability can still be leveraged in targeted attacks. The issue is not listed in the CISA KEV catalog, meaning there is no publicly known active exploitation. Attackers would need network access to the Parse Server endpoint and would craft a request with a highly nested query to produce the hang."}}}}, "created": "2026-03-25T11:46:43.993707+00:00", "updated": "2026-03-26T12:18:59.624484+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"]}