CVE-2026-30854
published 2026-03-07CVE-2026-30854: 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…
PriorityP432medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
0.28%
19.5th percentile
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
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| parse-community | parse-server | — | — |
| parse-community | parse-server | >= 9.3.1-alpha.3 < 9.5.0-alpha.10 | 9.5.0-alpha.10 |
| parseplatform | parse-server | — | — |
| parseplatform | parse-server | — | — |
| parseplatform | parse-server | >= 9.4.0 < 9.5.0 | 9.5.0 |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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GHSA
Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
ghsa·2026-03-09
CVE-2026-30854 [MEDIUM] CWE-863 Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
### 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/pa
OSV
Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
osv·2026-03-09
CVE-2026-30854 [MEDIUM] Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled
### 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/pa
No detection rules found.
No public exploits indexed.
2026-03-07
Published