CVE-2026-30854
Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
Impact
### Impact 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. ### Patches The check was changed from a flat iteration over root-level selections to a recursive walk of all selection sets, detecting `__type` inside inline fragments at any depth. ### Workarounds Require master key authentication at the network layer (e.g. reverse proxy) for the GraphQL endpoint. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.10
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | parse-server | >= 9.3.1-alpha.3, < 9.5.0-alpha.10 | 9.5.0-alpha.10 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Parseplatform | Parse-Server | from 9.4.0 before 9.5.0 Versions 9.3.1, 9.5.0 |