Parse Server role escalation and CLP bypass via direct `_Join` table write
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-284.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| parse-community | parse-server | >= 9.0.0 < 9.5.2-alpha.7; before 8.6.20 | 8.6.20 | Patch available | CNA |
| — | parse-server (npm) | 9.0.0-alpha.1 to before 9.5.2-alpha.7 | 9.5.2-alpha.7 | Patch available | GHSA-5f92-jrq3-28rc |
| — | parse-server (npm) | before 8.6.20 | 8.6.20 | Patch available | GHSA-5f92-jrq3-28rc |
- parse-server Vendorparse-community Affected >= 9.0.0 < 9.5.2-alpha.7; before 8.6.20 Fixed in 8.6.20 Patch available CNA
- parse-server (npm) Vendor— Affected 9.0.0-alpha.1 to before 9.5.2-alpha.7 Fixed in 9.5.2-alpha.7 Patch available GHSA-5f92-jrq3-28rc
- parse-server (npm) Vendor— Affected before 8.6.20 Fixed in 8.6.20 Patch available GHSA-5f92-jrq3-28rc
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* | before 8.6.20; 9.0.0 to before 9.5.2 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha1:*:*:*:node.js:*:* | 9.5.2 alpha1 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha2:*:*:*:node.js:*:* | 9.5.2 alpha2 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha3:*:*:*:node.js:*:* | 9.5.2 alpha3 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha4:*:*:*:node.js:*:* | 9.5.2 alpha4 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha5:*:*:*:node.js:*:* | 9.5.2 alpha5 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha6:*:*:*:node.js:*:* | 9.5.2 alpha6 | Vulnerable | parse-community |
- cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* Versions before 8.6.20; 9.0.0 to before 9.5.2 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha1:*:*:*:node.js:*:* Versions 9.5.2 alpha1 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha2:*:*:*:node.js:*:* Versions 9.5.2 alpha2 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha3:*:*:*:node.js:*:* Versions 9.5.2 alpha3 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha4:*:*:*:node.js:*:* Versions 9.5.2 alpha4 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha5:*:*:*:node.js:*:* Versions 9.5.2 alpha5 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha6:*:*:*:node.js:*:* Versions 9.5.2 alpha6 Vulnerable ·parse-community
Remediation
- Fix · CNA parse-server (parse-community) Fixed in 8.6.20
- Fix · GHSA-5f92-jrq3-28rc parse-server (npm) Fixed in 9.5.2-alpha.7 Advisory →
- Fix · GHSA-5f92-jrq3-28rc parse-server (npm) Fixed in 8.6.20 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-30966
- 2026-10-03 Alias added: GHSA-5f92-jrq3-28rc
References
More parse-community Parse-server vulnerabilities
- TI-2022-08574 Command Injection in Parse server CVSS 3.1CRITICAL 10.0
- TI-2024-18136 Parse Server literalizeRegexPart SQL Injection CVSS 3.1CRITICAL 10.0
- TI-2022-18768 Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser CVSS 3.1CRITICAL 9.8
- TI-2024-31550 Parse Server's custom object ID allows to acquire role privileges CVSS 3.1HIGH 8.1
- TI-2023-18316 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution CVSS 3.1CRITICAL 9.8
- TI-2026-23790 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter CVSS 4.0CRITICAL 9.9
Sources
- CVE-2026-30966 · CVE Program
- CVE-2026-30966 · NVD
- FIRST EPSS
- GHSA-5f92-jrq3-28rc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences