Parse Server's GraphQL "Did you mean ...?" validation suggestions disclose schema to unauthenticated callers
Impact
Parse Server's GraphQL endpoint discloses schema metadata to unauthenticated callers through Did you mean ...? suggestions embedded in GraphQL validation-error messages. An unauthenticated caller who knows only the public application id can iteratively send malformed queries to reconstruct class names, field names, argument names, mutation names, and input-object fields. This bypasses the IntrospectionControlPlugin enforced when graphQLPublicIntrospection: false (the default) and defeats the schema-hiding goal of prior advisories GHSA-48q3-prgv-gm4w and GHSA-q5q9-2rhp-33qw. Schema disclosure aids reconnaissance for downstream authorization probing but does not by itself leak object data or authentication material.
Patches
A new SchemaSuggestionsControlPlugin Apollo plugin strips the Did you mean ...? suffix from GraphQL validation-error messages during validationDidStart, which runs before any introspection gate. The plugin applies only when graphQLPublicIntrospection: false and the caller is not a master-key or maintenance-key holder, matching the trust model of the existing IntrospectionControlPlugin.
Workarounds
No code workaround is available short of disabling the GraphQL API (mountGraphQL: false). Operators who require disclosure-resistant validation errors should upgrade to a patched release.
Resources
- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-8cph-rgr4-g5vj
- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10467
- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10468
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | parse-server | >= 9.0.0, < 9.9.1-alpha.2, < 8.6.78 | 9.9.1-alpha.2, 8.6.78 |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-8cph-rgr4-g5vj
- https://nvd.nist.gov/vuln/detail/CVE-2026-47248
- https://github.com/parse-community/parse-server/pull/10467
- https://github.com/parse-community/parse-server/pull/10468
- https://github.com/parse-community/parse-server
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-209- Platform
- npm
- Package
parse-server- Disclosed
- 29.05.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-8cph-rgr4-g5vj - CC BY 4.0
Vulnerability history: parse-server
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 116
- First → latest
- 06.2019 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 17
- High 49
- Medium 40
- Low 10
Disclosures per year
- 2019: 2
- 2020: 4
- 2021: 4
- 2022: 12
- 2023: 5
- 2024: 4
- 2025: 6
- 2026: 79
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Parse Server's GraphQL "Did you mean ...?" validation suggestions disclose schema to unauthenticated callers this entry
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