Summary
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
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.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
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.
Frequently Asked Questions
- What is CVE-2026-47248? CVE-2026-47248 is a medium-severity security vulnerability in parse-server (npm), affecting versions >= 9.0.0, < 9.9.1-alpha.2. It is fixed in 9.9.1-alpha.2, 8.6.78.
- Which versions of parse-server are affected by CVE-2026-47248? parse-server (npm) versions >= 9.0.0, < 9.9.1-alpha.2 is affected.
- Is there a fix for CVE-2026-47248? Yes. CVE-2026-47248 is fixed in 9.9.1-alpha.2, 8.6.78. Upgrade to this version or later.
- Is CVE-2026-47248 exploitable, and should I be worried? Whether CVE-2026-47248 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-47248 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-47248?
- Upgrade
parse-serverto 9.9.1-alpha.2 or later - Upgrade
parse-serverto 8.6.78 or later
- Upgrade