CVE-2026-30854
MEDIUM
GHSA-q5q9-2rhp-33qw
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
3Tags
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. From version 9.3.1-alpha.3 to before version 9.5.0-alpha.10, when graphQLPublicIntrospection is disabled, __type queries nested inside inline fragments (e.g. ... on Query { __type(name:"User") { name } }) bypass the introspection control, allowing unauthenticated users to perform type reconnaissance. __schema introspection is not affected. This issue has been patched in version 9.5.0-alpha.10.
Analysis
Parse Server versions 9.3.1-alpha.3 through 9.5.0-alpha.9 allow unauthenticated attackers to bypass GraphQL introspection restrictions by nesting __type queries within inline fragments, enabling unauthorized schema reconnaissance. An attacker can exploit this to enumerate available types and fields in the GraphQL API despite the graphQLPublicIntrospection control being disabled. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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