{"id":"CVE-2026-30854","aliases":["BIT-parse-2026-30854","GHSA-q5q9-2rhp-33qw"],"url":"https://o3.security/vulnerability/CVE-2026-30854","summary":"Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled","details":"### Impact\n\nWhen `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.\n\n### Patches\n\nThe 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.\n\n### Workarounds\n\nRequire master key authentication at the network layer (e.g. reverse proxy) for the GraphQL endpoint.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.10","published":"2026-03-07T16:24:10.312Z","modified":"2026-08-12T03:51:25.365797049Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.5.0-alpha.10"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30854.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30854"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:25.365797049Z"}}