What’s Vulnerable › Vulnerabilities
CVE-2026-30854: Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-07 · updated 2026-06-17
- Weakness: CWE-863
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.
Affected products
- parse-community parse-server: from 9.4.0 before 9.5.0; 9.3.1-alpha3, 9.3.1-alpha4, 9.5.0-alpha1, 9.5.0-alpha2, 9.5.0-alpha3, 9.5.0-alpha4 (+5) — fixed in 9.5.0
How to fix
Upgrade to a fixed version: parse-community parse-server 9.5.0. Check the vendor advisory for mitigations.
References
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