CVE-2026-66008
mediumpriority · track · 0EPSS 0.006 · 46 %ileEUUSEPSS · scored 2026-10-23
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.7–6.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- BIT-parse-2026-66008Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages2026-09-25vendor · osvUS
Parse Server versions >= 9.0.0 before 9.10.0 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.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://github.com/parse-community/parse-server/security/advisories/GHSA-r2g6-4f6j-f6rfcnnvd
- https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-graphql-error-messagescnnvd
- https://github.com/parse-community/parse-server/security/advisories/GHSA-r2g6-4f6j-f6rfenisa_euvd
- https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-graphql-error-messagesenisa_euvd
- https://github.com/parse-community/parse-server/security/advisories/GHSA-r2g6-4f6j-f6rfnvd
- https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-graphql-error-messagesnvd
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