CVE-2026-66008 Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages
Unauthenticated attackers can reveal hidden schema class names via GraphQL error messages in Parse Server, bypassing schema-hiding protections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-66008?
CVE-2026-66008 is a medium-severity vulnerability in parse-community parse-server, published on 24 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Parse Server versions >= 9.0.0 before 9.10.0-alpha.6 and >= 8.2.2 before 8.6.87 disclose Pointer and Relation target class names through GraphQL validation and input-coercion error messages when public schema introspection is disabled (graphQLPublicIntrospection: false, the default). Because these errors are produced before authentication, authorization, or any resolver runs, an unauthenticated client possessing only the public application ID can trigger errors on Pointer or Relation fields to reconstruct hidden schema class names, partially defeating the schema-hiding protection. Only schema metadata (class names) is exposed; no object data, credentials, or user records are disclosed.
Weakness: CWE-209
Which versions are affected by CVE-2026-66008?
1 open source package ship an affected version, including parse.
| Package | Affected | Fixed in |
|---|---|---|
parse Bitnami | From 8.2.2 | 8.6.87, 9.10.0 |
How do I fix CVE-2026-66008?
Upgrade parse to a fixed version for your release line: 8.6.87 or 9.10.0.
Is CVE-2026-66008 being exploited?
There is no known exploitation of CVE-2026-66008 in the wild and no public exploit code.
Sources
Also known as BIT-parse-2026-66008, GHSA-5fc6-2494-x3q8, GHSA-r2g6-4f6j-f6rf.