CVE-2026-66009

Published: Lug 24, 2026 Last Modified: Lug 25, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

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.

209

Generation of Error Message Containing Sensitive Information

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality
Potential Impacts:
Read Application Data
Applicable Platforms
Languages: PHP, Java, Not Language-Specific
Likelihood of Exploit: High
View CWE Details
https://github.com/parse-community/parse-server/security/ad…
https://github.com/parse-community/parse-server/security/advisories/GHSA-2fgh-8…
https://www.vulncheck.com/advisories/parse-server-informati…
https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-gr…