Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages
Parse Server versions >= 9.0.0 before 9.10.0-alpha.6 and >= 8.2.2 before 8.6.87 disclose Pointer and Relation target class names through GraphQL validation and input-coercion error messages when public schema introspection is disabled (graphQLPublicIntrospection: false, the default). Because these errors are produced before authentication, authorization, or any resolver runs, an unauthenticated client possessing only the public application ID can trigger errors on Pointer or Relation fields to reconstruct hidden schema class names, partially defeating the schema-hiding protection. Only schema metadata (class names) is exposed; no object data, credentials, or user records are disclosed.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-66008
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 6 Nov 2026, 01:24 UTC · Revision 1
Source evidence
Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages
core-osv · Original sourcePublished 24 Jul 2026, 12:07 UTC
Parse Server versions >= 9.0.0 before 9.10.0-alpha.6 and >= 8.2.2 before 8.6.87 disclose Pointer and Relation target class names through GraphQL validation and input-coercion error messages when public schema introspection is disabled (graphQLPublicIntrospection: false, the default). Because these errors are produced before authentication, authorization, or any resolver runs, an unauthenticated client possessing only the public application ID can trigger errors on Pointer or Relation fields to reconstruct hidden schema class names, partially defeating the schema-hiding protection. Only schema metadata (class names) is exposed; no object data, credentials, or user records are disclosed.
osv:CVE-2026-66008
Complete source record
{
"id": "2e7de79a10f26c1060c25912a774762b8b402d87b8e146f7171a3fadb4b387f1",
"url": "https://osv.dev/vulnerability/CVE-2026-66008",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages",
"summary": "Parse Server versions >= 9.0.0 before 9.10.0-alpha.6 and >= 8.2.2 before 8.6.87 disclose Pointer and Relation target class names through GraphQL validation and input-coercion error messages when public schema introspection is disabled (graphQLPublicIntrospection: false, the default). Because these errors are produced before authentication, authorization, or any resolver runs, an unauthenticated client possessing only the public application ID can trigger errors on Pointer or Relation fields to reconstruct hidden schema class names, partially defeating the schema-hiding protection. Only schema metadata (class names) is exposed; no object data, credentials, or user records are disclosed.",
"evidence": "osv:CVE-2026-66008",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-66008",
"aliases": [
"BIT-parse-2026-66008",
"CVE-2026-66008",
"GHSA-r2g6-4f6j-f6rf"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/parse-community/parse-server",
"type": "GIT",
"events": [
{
"introduced": "532a461d30a6ed4457839f2caf5f30d5abf51a55"
},
{
"fixed": "348d90ed54263997af649fbcb9c4b1ffbb43fb68"
},
{
"introduced": "e3f5ae0be78361daffee9e8bde148906e9b878f9"
},
{
"fixed": "19611b7e93e999dc545b6f53ee444f3fa53d7596"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "9.0.0"
},
{
"fixed": "9.10.0-alpha.6"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "8.2.2"
},
{
"fixed": "8.6.87"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
}
],
"versions": [
"9.9.0",
"8.6.86",
"9.10.0-alpha.5",
"8.6.85",
"9.10.0-alpha.4",
"8.6.84",
"9.10.0-alpha.3",
"9.10.0-alpha.2",
"8.6.83",
"9.10.0-alpha.1",
"9.9.1-alpha.13",
"8.6.82",
"9.9.1-alpha.12",
"8.6.81",
"9.9.1-alpha.11",
"8.6.80",
"9.9.1-alpha.10",
"9.9.1-alpha.9",
"9.9.1-alpha.8",
"9.9.1-alpha.7",
"9.9.1-alpha.6",
"8.6.79",
"9.9.1-alpha.5",
"9.9.1-alpha.4",
"8.6.78",
"9.9.1-alpha.3",
"9.9.1-alpha.2",
"8.6.77",
"9.9.1-alpha.1",
"8.6.76",
"9.8.0",
"8.6.75",
"9.7.0",
"8.6.74",
"8.6.73",
"8.6.72",
"8.6.71",
"8.6.70",
"9.6.1",
"8.6.69",
"8.6.68",
"8.6.67",
"8.6.66",
"8.6.65",
"8.6.64",
"8.6.63",
"8.6.62",
"9.6.0",
"9.5.1",
"8.6.61",
"8.6.60",
"8.6.59",
"8.6.58",
"8.6.57",
"8.6.56",
"8.6.55",
"8.6.54",
"8.6.53",
"8.6.52",
"8.6.51",
"8.6.50",
"8.6.49",
"8.6.48",
"8.6.47",
"8.6.46",
"8.6.45",
"8.6.44",
"8.6.43",
"8.6.42",
"8.6.41",
"8.6.40",
"8.6.39",
"8.6.38",
"8.6.37",
"8.6.36",
"8.6.35",
"8.6.34",
"8.6.33",
"8.6.32",
"8.6.31",
"8.6.30",
"8.6.29",
"8.6.28",
"8.6.27",
"8.6.26",
"8.6.25",
"8.6.24",
"8.6.23",
"8.6.22",
"8.6.21",
"8.6.20",
"8.6.19",
"8.6.18",
"8.6.17",
"8.6.16",
"8.6.15",
"8.6.14",
"8.6.13",
"9.5.0",
"8.6.12",
"8.6.11",
"9.4.1",
"8.6.10",
"8.6.9",
"8.6.8",
"8.6.7",
"8.6.6",
"8.6.5",
"8.6.4",
"9.4.0",
"8.6.3",
"9.3.1",
"9.3.0",
"8.6.2",
"9.2.0",
"9.1.1",
"9.1.0",
"8.6.1",
"9.0.0",
"8.6.0",
"8.5.0",
"8.4.0",
"8.3.0",
"8.2.5",
"8.2.4",
"8.2.3",
"8.2.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66008.json"
}
}
],
"modified": "2026-10-28T02:30:45.603928934Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66008.json",
"https://github.com/parse-community/parse-server/security/advisories/GHSA-r2g6-4f6j-f6rf",
"https://nvd.nist.gov/vuln/detail/CVE-2026-66008",
"https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-graphql-error-messages"
],
"provider_metadata": {
"cwe_ids": [
"CWE-209"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66008.json"
}
},
"related_cves": [
{
"value": "CVE-2026-66008",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 513830,
"published_at": "2026-07-24T12:07:55.967+00:00"
}