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Parse Server EUVDEUVD-2026-48580

| CVE-2026-66008 MEDIUM
Error Message Information Leak (CWE-209)
2026-07-24 VulnCheck GHSA-5fc6-2494-x3q8
6.3
CVSS 4.0 · Vendor: VulnCheck
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Error message sanitization
MITRE ATT&CK

1 technique across 1 tactic: Discovery

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 26, 2026

Information disclosure in Parse Server GraphQL error messages exposes hidden schema class names to unauthenticated attackers when public schema introspection is disabled. Affects versions 9.0.0 before 9.10.0-alpha.6 and 8.2.2 before 8.6.87. Only class names are disclosed, not object data; no public exploit or active exploitation identified.

Affected VersionsENISA

parse-server 9.0.0 <9.10.0-alpha.6
parse-server 8.2.2 <8.6.87

Affected Packages

euvd parse_server fix: 8.6.87, 9.10.0-alpha.6

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (VulnCheck) PRIMARY 6.3 MEDIUM
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

Primary rating from Vendor (VulnCheck) · only source for this CVE.

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

1
Patch available
Jul 24, 2026 - 14:32 EUVD

DescriptionCVE.org

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.

Threat Intelligence Overview

EPSS Score
0.3%
Top 76% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

CVE-2022-24760 CRITICAL POC
10.0 Mar 12

Parse Server is an open source http web server backend. Rated critical severity (CVSS 10.0), this vulnerability is remot

CVE-2026-32248 CRITICAL POC
9.8 Mar 12

Unauthenticated query injection in Parse Server before 9.6.0-alpha.12/8.6.38. PoC available.

CVE-2026-30965 CRITICAL POC
9.1 Mar 10

Parse Server has an incorrect authorization vulnerability enabling unauthorized data access across applications.

CVE-2026-32242 HIGH POC
7.4 Mar 12

### Impact Parse Server's built-in OAuth2 auth adapter exports a singleton instance that is reused directly across all

CVE-2026-30966 CRITICAL
10.0 Mar 10

Parse Server has a CVSS 10.0 access control vulnerability enabling complete bypass of all data access restrictions.

CVE-2024-27298 CRITICAL
10.0 Mar 01

parse-server is a Parse Server for Node.js / Express. Rated critical severity (CVSS 10.0), this vulnerability is remotel

CVE-2026-30863 CRITICAL
9.8 Mar 07

Authentication bypass in Parse Server allows unauthenticated access to protected API endpoints. Parse Server is a popula

CVE-2026-31840 CRITICAL
9.8 Mar 11

SQL injection in Parse Server before 9.6.0-alpha.2/8.6.28.

CVE-2026-31871 CRITICAL
9.8 Mar 11

SQL injection in Parse Server before 9.6.0-alpha.5/8.6.31. Third Parse Server SQLi.

CVE-2026-31856 CRITICAL
9.8 Mar 11

SQL injection in Parse Server before 9.6.0-alpha.5/8.6.31.

CVE-2023-36475 CRITICAL
9.8 Jun 28

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Rated critical s

CVE-2022-41878 CRITICAL
9.8 Nov 10

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Rated critical s

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