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CVE-2026-30966— Parse Server role escalation and CLP bypass via direct `_Join` table write

Quick assessment

Affected
parse-community parse-server
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 9.5.2-alpha.7之前版本和8.6.20之前版本存在访问控制错误漏洞，该漏洞源于内部关系表访问控制不当，可能导致权限提升。

CVSS 10.0 · Critical EPSS 0.54% · P43
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I. Basic Information for CVE-2026-30966

Vulnerability Information
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Vulnerability Title
Parse Server role escalation and CLP bypass via direct `_Join` table write
Source: CVE Program / CVE List V5
Vulnerability Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.7 and 8.6.20, Parse Server's internal tables, which store Relation field mappings such as role memberships, can be directly accessed via the REST API or GraphQL API by any client using only the application key. No master key is required. An attacker can create, read, update, or delete records in any internal relationship table. Exploiting this allows the attacker to inject themselves into any Parse Role, gaining all permissions associated with that role, including full read, write, and delete access to classes protected by role-based Class-Level Permissions (CLP). Similarly, writing to any such table that backs a Relation field used in a pointerFields CLP bypasses that access control. This vulnerability is fixed in 9.5.2-alpha.7 and 8.6.20.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Parse Server 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 9.5.2-alpha.7之前版本和8.6.20之前版本存在访问控制错误漏洞，该漏洞源于内部关系表访问控制不当，可能导致权限提升。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
parse-community parse-server >= 9.0.0 < 9.5.2-alpha.7 -

II. Public POCs for CVE-2026-30966

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Qwen3.6-35B-A3B · 7811 chars
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III. Intelligence Information for CVE-2026-30966

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Vendor Advisories for CVE-2026-30966 (1)

Vendor Pages for CVE-2026-30966 (2)

Same Patch Batch · parse-community · 2026-03-10 · 14 CVEs total

CVE-2026-30939 Parse Server has Denial of Service (DoS) and Cloud Function Dispatch Bypass via Prototype
CVE-2026-30941 Parse Server has a NoSQL injection via token type in password reset and email verification
CVE-2026-30938 Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested obje
CVE-2026-30948 Parse Server has stored cross-site scripting (XSS) via SVG file upload
CVE-2026-30949 Parse Server is missing audience validation in Keycloak authentication adapter
CVE-2026-30946 Parse Server affected by denial-of-service via unbounded query complexity in REST and Grap
CVE-2026-30947 Parse Server ha a bypass of class-level permissions in LiveQuery
CVE-2026-31800 Parse Server: Classes `_GraphQLConfig` and `_Audience` master key bypass via generic class
CVE-2026-30972 Parse Server has a rate limit bypass via batch request endpoint
CVE-2026-30962 Parse Server has a protected fields bypass via logical query operators
CVE-2026-30967 Parse Server OAuth2 authentication adapter account takeover via identity spoofing
CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
CVE-2026-31828 Parse Server has an LDAP injection via unsanitized user input in DN and group filter const

IV. Related Vulnerabilities

Same product: parse-server
Same vendor: parse-community
Same weakness: CWE-284

V. Comments for CVE-2026-30966

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