Parse Server vulnerable to schema poisoning via prototype pollution in deep copy
Priority LOW 24CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.20 and 8.6.44, an attacker can bypass the default request keyword denylist protection and the class-level permission for adding fields by sending a crafted request that exploits prototype pollution in the deep copy mechanism. This allows injecting fields into class schemas that have field addition locked down, and can cause permanent schema type conflicts that cannot be resolved even with the master key. In 9.6.0-alpha.20 and 8.6.44, the vulnerable third-party deep copy library has been replaced with a built-in deep clone mechanism that handles prototype properties safely, allowing the existing denylist check to correctly detect and reject the prohibited keyword. No known workarounds are available.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00365 30th percentileScored 2026-11-07
Fix Fixed parse-server (parse-community): 9.6.0-alpha.20, 8.6.44parse-server (npm): 9.6.0-alpha.20, 8.6.44
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 to before 9.6.0-alpha.20; before 8.6.44 | 9.6.0-alpha.20, 8.6.44 | Patch available | CNA |
| — | parse-server (npm) | 9.0.0 to before 9.6.0-alpha.20 | 9.6.0-alpha.20 | Patch available | GHSA-9ccr-fpp6-78qf |
| — | parse-server (npm) | before 8.6.44 | 8.6.44 | Patch available | GHSA-9ccr-fpp6-78qf |
- parse-server Vendorparse-community Affected 9.0.0 to before 9.6.0-alpha.20; before 8.6.44 Fixed in 9.6.0-alpha.20, 8.6.44 Patch available CNA
- parse-server (npm) Vendor— Affected 9.0.0 to before 9.6.0-alpha.20 Fixed in 9.6.0-alpha.20 Patch available GHSA-9ccr-fpp6-78qf
- parse-server (npm) Vendor— Affected before 8.6.44 Fixed in 8.6.44 Patch available GHSA-9ccr-fpp6-78qf
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* | before 8.6.44; 9.0.0 to before 9.6.0 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:* | 9.6.0 alpha1 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10:*:*:*:node.js:*:* | 9.6.0 alpha10 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11:*:*:*:node.js:*:* | 9.6.0 alpha11 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12:*:*:*:node.js:*:* | 9.6.0 alpha12 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13:*:*:*:node.js:*:* | 9.6.0 alpha13 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14:*:*:*:node.js:*:* | 9.6.0 alpha14 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15:*:*:*:node.js:*:* | 9.6.0 alpha15 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16:*:*:*:node.js:*:* | 9.6.0 alpha16 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17:*:*:*:node.js:*:* | 9.6.0 alpha17 | Vulnerable | parse-community |
- cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* Versions before 8.6.44; 9.0.0 to before 9.6.0 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:* Versions 9.6.0 alpha1 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10:*:*:*:node.js:*:* Versions 9.6.0 alpha10 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11:*:*:*:node.js:*:* Versions 9.6.0 alpha11 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12:*:*:*:node.js:*:* Versions 9.6.0 alpha12 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13:*:*:*:node.js:*:* Versions 9.6.0 alpha13 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14:*:*:*:node.js:*:* Versions 9.6.0 alpha14 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15:*:*:*:node.js:*:* Versions 9.6.0 alpha15 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16:*:*:*:node.js:*:* Versions 9.6.0 alpha16 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17:*:*:*:node.js:*:* Versions 9.6.0 alpha17 Vulnerable ·parse-community
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18:*:*:*:node.js:*:* | 9.6.0 alpha18 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha19:*:*:*:node.js:*:* | 9.6.0 alpha19 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:* | 9.6.0 alpha2 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:* | 9.6.0 alpha3 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4:*:*:*:node.js:*:* | 9.6.0 alpha4 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5:*:*:*:node.js:*:* | 9.6.0 alpha5 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha6:*:*:*:node.js:*:* | 9.6.0 alpha6 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha7:*:*:*:node.js:*:* | 9.6.0 alpha7 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha8:*:*:*:node.js:*:* | 9.6.0 alpha8 | Vulnerable | parse-community |
| cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha9:*:*:*:node.js:*:* | 9.6.0 alpha9 | Vulnerable | parse-community |
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18:*:*:*:node.js:*:* Versions 9.6.0 alpha18 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha19:*:*:*:node.js:*:* Versions 9.6.0 alpha19 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:* Versions 9.6.0 alpha2 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:* Versions 9.6.0 alpha3 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4:*:*:*:node.js:*:* Versions 9.6.0 alpha4 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5:*:*:*:node.js:*:* Versions 9.6.0 alpha5 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha6:*:*:*:node.js:*:* Versions 9.6.0 alpha6 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha7:*:*:*:node.js:*:* Versions 9.6.0 alpha7 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha8:*:*:*:node.js:*:* Versions 9.6.0 alpha8 Vulnerable ·parse-community
- cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha9:*:*:*:node.js:*:* Versions 9.6.0 alpha9 Vulnerable ·parse-community
Remediation
- Fix · CNA parse-server (parse-community) Fixed in 9.6.0-alpha.20, 8.6.44
- Fix · GHSA-9ccr-fpp6-78qf parse-server (npm) Fixed in 9.6.0-alpha.20 Advisory →
- Fix · GHSA-9ccr-fpp6-78qf parse-server (npm) Fixed in 8.6.44 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-32878
- 2026-10-03 Alias added: GHSA-9ccr-fpp6-78qf
References
Advisory 2
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-2026-32878 · CVE Program
- CVE-2026-32878 · NVD
- FIRST EPSS
- GHSA-9ccr-fpp6-78qf · 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