PatchSiren cyber security CVE debrief
CVE-2026-66008 parse-community CVE debrief
CVE-2026-66008 is a medium-severity vulnerability in Parse Server that discloses Pointer and Relation target class names through GraphQL validation and input-coercion error messages when public schema introspection is disabled. The vulnerability affects Parse Server versions >= 9.0.0 before 9.10.0-alpha.6 and >= 8.2.2 before 8.6.87. This vulnerability allows an unauthenticated client to reconstruct hidden schema class names, partially defeating the schema-hiding protection, by triggering errors on Pointer or Relation fields. Only schema metadata (class names) is exposed; no object data, credentials, or user records are disclosed.
- Vendor
- parse-community
- Product
- parse-server
- CVSS
- MEDIUM 6.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-24
- Original CVE updated
- 2026-07-27
- Advisory published
- 2026-07-24
- Advisory updated
- 2026-07-27
Who should care
Users of Parse Server, especially those who have disabled public schema introspection, should be aware of this vulnerability and take steps to mitigate it. This includes updating to the latest versions of Parse Server and implementing additional security measures to protect against unauthorized schema access. System administrators and security teams responsible for Parse Server deployments should review the vulnerability details and assess their exposure.
Technical summary
The vulnerability occurs because GraphQL validation and input-coercion error messages can disclose Pointer and Relation target class names when public schema introspection is disabled. This can allow an unauthenticated client 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. The vulnerability affects Parse Server versions >= 9.0.0 before 9.10.0-alpha.6 and >= 8.2.2 before 8.6.87.
Defensive priority
Medium
Recommended defensive actions
- Update Parse Server to version 9.10.0-alpha.6 or later, or 8.6.87 or later
- Enable public schema introspection if not already enabled
- Monitor for suspicious GraphQL queries
- Implement additional security measures to protect against unauthorized schema access
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
Evidence notes
The CVE record was published on 2026-07-24T13:18:28.450Z and was last modified on 2026-07-27T20:32:11.620Z. The NVD entry is currently Deferred. This information is based on the provided source corpus and may not reflect the most up-to-date information. Users should verify the details with the official sources for the most accurate and current information.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-24T13:18:28.450Z and has not been modified since then. The NVD entry is currently Deferred.