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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.

PUBLISHED Reserved 2026-03-05 | Published 2026-03-07 | Updated 2026-03-07 | Assigner GitHub_M




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-863: Incorrect Authorization

Product status

>= 9.3.1-alpha.3, < 9.5.0-alpha.10
affected

References

github.com/...server/security/advisories/GHSA-q5q9-2rhp-33qw

cve.org (CVE-2026-30854)

nvd.nist.gov (CVE-2026-30854)

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