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    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-109303",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-12T14:13:39.027Z",
        "datePublished": "2026-10-12T16:05:00.257Z",
        "dateUpdated": "2026-10-12T16:05:00.257Z"
    },
    "containers": {
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                "dateUpdated": "2026-10-12T16:05:00.257Z"
            },
            "datePublic": "2026-09-22T00:00:00.000Z",
            "title": "Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 protectedFields Bypass via Relation Count Query",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 does not enforce identity-scoped protectedFields (authenticated, role, or per-user groups) on count queries using the $relatedTo operator, exposing the size of protected Relation fields. An authenticated user who can read the owning object can combine counts with an objectId constraint as a membership oracle to reveal confidential memberships such as private groups or block lists."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Authorization Bypass Through User-Controlled Key",
                            "cweId": "CWE-639",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "parse-community",
                    "product": "parse-server",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/parse-server",
                    "versions": [
                        {
                            "version": "9.0.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "9.10.1-alpha.13"
                        },
                        {
                            "version": "9.10.1-alpha.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "vendor": "parse-community",
                    "product": "parse-server",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/parse-server",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.6.93"
                        },
                        {
                            "version": "8.6.93",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
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                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "9.0.0",
                                    "versionEndExcluding": "9.10.1-alpha.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "8.6.93"
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                            ]
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            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM"
                    }
                },
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                        "scope": "UNCHANGED",
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                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                        "baseScore": 4.3,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-rmhf-xv62-rm99",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "name": "GitHub Security Advisory (GHSA-rmhf-xv62-rm99)"
                },
                {
                    "name": "VulnCheck Advisory: Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 protectedFields Bypass via Relation Count Query",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/parse-server-before-8.6.93-and-9.0.0-before-9.10.1-alpha.13-protectedfields-bypass-via-relation-count-query"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "d3do-23",
                    "type": "reporter"
                },
                {
                    "lang": "en",
                    "value": "mtrezza",
                    "type": "coordinator"
                }
            ],
            "x_generator": {
                "engine": "vulncheck-endgame"
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        }
    }
}