Information Exposure Through an Error Message in Parse Server - CVE-2026-66008
Published: September 15, 2026
Vulnerability identifier: #VU149929
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-66008
CWE-ID: CWE-209
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose hidden schema class names.
The vulnerability exists due to generation of error messages containing sensitive information in GraphQL validation and input-coercion error handling when processing GraphQL operations that reference Pointer or Relation field names. A remote attacker can elicit error messages containing target class names to disclose hidden schema class names.
The GraphQL API must be mounted with public schema introspection disabled; only schema metadata is exposed, not object data, credentials, or user records.
Affected software
Parse Server
How to mitigate CVE-2026-66008
Install security update from vendor's website.
Parse Server - addressed in versions 8.6.87, 9.10.0 alpha.6