Parse Server has Denial of Service (DoS) and Cloud Function Dispatch Bypass via Prototype Chain Resolution
Impact
An unauthenticated attacker can crash the Parse Server process by calling a Cloud Function endpoint with a prototype property name as the function name. The server recurses infinitely, causing a call stack size error that terminates the process.
Other prototype property names bypass Cloud Function dispatch validation and return HTTP 200 responses, even though no such Cloud Functions are defined. The same applies to dot-notation traversal.
All Parse Server deployments that expose the Cloud Function endpoint are affected.
Patches
The internal handler registries for Cloud Functions, Jobs, Triggers, and Validators have been changed to prevent prototype chain properties from being resolved.
Workarounds
Place a reverse proxy or WAF in front of Parse Server and block requests to Object.prototype property names.
References
- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-5j86-7r7m-p8h6
- Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.2
- Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.13
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | parse-server | < 8.6.13, >= 9.0.0-alpha.1, < 9.5.1-alpha.2 | 8.6.13, 9.5.1-alpha.2 |
Referencias
- https://github.com/parse-community/parse-server/security/advisories/GHSA-5j86-7r7m-p8h6
- https://nvd.nist.gov/vuln/detail/CVE-2026-30939
- https://github.com/parse-community/parse-server
- https://github.com/parse-community/parse-server/releases/tag/8.6.13
- https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.2
- Vector CVSS
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N- Debilidad (CWE)
CWE-1321- Plataforma
- npm
- Paquete
parse-server- Publicada
- 10.03.2026
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-5j86-7r7m-p8h6 - CC BY 4.0
Historial de vulnerabilidades: parse-server
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 116
- Primera → última
- 06.2019 06.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 17
- Alta 49
- Media 40
- Baja 10
Divulgaciones por año
- 2019: 2
- 2020: 4
- 2021: 4
- 2022: 12
- 2023: 5
- 2024: 4
- 2025: 6
- 2026: 79
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Parse Server has Denial of Service (DoS) and Cloud Function Dispatch Bypass via Prototype Chain Resolution esta entrada
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