Vulnerability · Published Jul 24, 2026 · Assigned by VulnCheck
CVE-2026-66008Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages
Medium 6.3
In plain English
A medium-severity security flaw in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| parse-community | parse-server | 9.0.0 – before 9.10.0-alpha.6 |
| parse-community | parse-server | 8.2.2 – before 8.6.87 |
Weakness: CWE-209 · 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
References
- GitHub Security Advisory (GHSA-r2g6-4f6j-f6rf) vendor-advisory
- VulnCheck Advisory: Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages third-party-advisory