CVE-2026-30854: Parseplatform Parse-Server

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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

• Parseplatform Parse-Server: from 9.4.0, before 9.5.0 (fixed in 9.5.0); version 9.3.1 only; version 9.5.0 only

Published 2026-03-07. Last modified 2026-06-17.