{"id":"CVE-2026-66009","state":"PUBLISHED","title":"Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages","description":"Parse Server versions >= 9.0.0 before 9.10.0-alpha.5 and >= 8.2.2 before 8.6.86 return GraphQL validation error messages that name required custom input fields even when public introspection is disabled (graphQLPublicIntrospection: false, the default). A client holding only the public application id — with no user session, master key, or maintenance key — can trigger validation errors to learn the names of required (non-null) custom fields on classes it already references by name, partially defeating the schema-hiding intent of disabling public introspection. No stored data, credentials, optional field names, unreferenced class names, or Cloud Code function names are exposed.","publishedAt":"2026-07-24T12:07:56.720Z","updatedAt":"2026-07-28T01:06:21.175Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["parse-community parse-server"],"affected":[{"vendor":"parse-community","product":"parse-server","packageURL":"pkg:npm/parse-server","defaultStatus":"unaffected","versions":[{"version":"9.0.0","status":"affected","lessThan":"9.10.0-alpha.5","versionType":"semver"},{"version":"9.10.0-alpha.5","status":"unaffected","versionType":"semver"}]},{"vendor":"parse-community","product":"parse-server","packageURL":"pkg:npm/parse-server","defaultStatus":"unaffected","versions":[{"version":"8.2.2","status":"affected","lessThan":"8.6.86","versionType":"semver"},{"version":"8.6.86","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/parse-community/parse-server/security/advisories/GHSA-2fgh-8j2g-w354","https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-graphql-error-messages-2"],"weaknesses":["CWE-209"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/66xxx/CVE-2026-66009.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-66009","state":"PUBLISHED","datePublished":"2026-07-24T12:07:56.720Z","dateUpdated":"2026-07-28T01:06:21.175Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-23T19:22:30.643Z"},"containers":{"cna":{"title":"Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages","descriptions":[{"lang":"en","value":"Parse Server versions >= 9.0.0 before 9.10.0-alpha.5 and >= 8.2.2 before 8.6.86 return GraphQL validation error messages that name required custom input fields even when public introspection is disabled (graphQLPublicIntrospection: false, the default). A client holding only the public application id — with no user session, master key, or maintenance key — can trigger validation errors to learn the names of required (non-null) custom fields on classes it already references by name, partially defeating the schema-hiding intent of disabling public introspection. No stored data, credentials, optional field names, unreferenced class names, or Cloud Code function names are exposed."}],"affected":[{"vendor":"parse-community","product":"parse-server","packageURL":"pkg:npm/parse-server","defaultStatus":"unaffected","versions":[{"version":"9.0.0","status":"affected","lessThan":"9.10.0-alpha.5","versionType":"semver"},{"version":"9.10.0-alpha.5","status":"unaffected","versionType":"semver"}]},{"vendor":"parse-community","product":"parse-server","packageURL":"pkg:npm/parse-server","defaultStatus":"unaffected","versions":[{"version":"8.2.2","status":"affected","lessThan":"8.6.86","versionType":"semver"},{"version":"8.6.86","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-2fgh-8j2g-w354","name":"GitHub Security Advisory (GHSA-2fgh-8j2g-w354)","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-graphql-error-messages-2","name":"VulnCheck Advisory: Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-209","lang":"en","description":"Generation of Error Message Containing Sensitive Information","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-07-28T01:06:21.175Z"},"datePublic":"2026-07-10T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.10.0-alpha.5"},{"vulnerable":true,"criteria":"cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*","versionStartIncluding":"8.2.2","versionEndExcluding":"8.6.86"}]}]}],"credits":[{"lang":"en","value":"mtrezza","type":"coordinator"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-25T00:52:12.374484Z","id":"CVE-2026-66009","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-25T00:52:22.059Z"}}]}}}