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CVE-2026-66009— Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages

Quick assessment

Affected
parse-community parse-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

parse-community parse-server是parse-community的后端服务框架。 parse-community parse-server 9.0.0版本至9.10.0-alpha.5之前版本和8.2.2版本至8.6.86之前版本存在信息泄露漏洞，该漏洞源于即使禁用了GraphQL公共内省，验证错误消息仍会泄露必需的custom input字段名称，可能导致未认证攻击者利用公钥应用ID探测到这些字段名称，部分破坏隐藏schema的意图。

CVSS 6.3 · Medium EPSS 0.26% · P18

Affected Version Matrix 4

VendorProduct Version RangeStatus
parse-community parse-server 9.0.0< 9.10.0-alpha.5 affected
9.10.0-alpha.5 unaffected
8.2.2< 8.6.86 affected
8.6.86 unaffected
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I. Basic Information for CVE-2026-66009

Vulnerability Information
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Vulnerability Title
Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages
Source: CVE Program / CVE List V5
Vulnerability Description
Parse Server versions >= 9.0.0 before 9.10.0-alpha.5 and >= 8.2.2 before 8.6.86 return GraphQL validation error messages that name required custom input fields even when public introspection is disabled (graphQLPublicIntrospection: false, the default). A client holding only the public application id — with no user session, master key, or maintenance key — can trigger validation errors to learn the names of required (non-null) custom fields on classes it already references by name, partially defeating the schema-hiding intent of disabling public introspection. No stored data, credentials, optional field names, unreferenced class names, or Cloud Code function names are exposed.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
通过错误消息导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
parse-community parse-server 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
parse-community parse-server是parse-community的后端服务框架。 parse-community parse-server 9.0.0版本至9.10.0-alpha.5之前版本和8.2.2版本至8.6.86之前版本存在信息泄露漏洞，该漏洞源于即使禁用了GraphQL公共内省，验证错误消息仍会泄露必需的custom input字段名称，可能导致未认证攻击者利用公钥应用ID探测到这些字段名称，部分破坏隐藏schema的意图。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
parse-community parse-server 9.0.0 ~ 9.10.0-alpha.5 -
parse-community parse-server 8.2.2 ~ 8.6.86 -

II. Public POCs for CVE-2026-66009

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III. Intelligence Information for CVE-2026-66009

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Vendor Advisories for CVE-2026-66009 (2)

IV. Related Vulnerabilities

Same product: parse-server
Same vendor: parse-community
Same weakness: CWE-209

V. Comments for CVE-2026-66009

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