CVE-2026-30939

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.13 and 9.5.1-alpha.2, 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. This vulnerability is fixed in 8.6.13 and 9.5.1-alpha.2.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/parse-community/parse-server/releases/tag/8.6.13	Product Release Notes
https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.2	Product Release Notes
https://github.com/parse-community/parse-server/security/advisories/GHSA-5j86-7r7m-p8h6	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:parseplatform:parse-server::::::node.js::*
	cpe:2.3:a:parseplatform:parse-server::::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.5.1:alpha1::::node.js::*

History

No history.

Information

Published : 2026-03-10 18:18

Updated : 2026-03-11 19:51

NVD link : CVE-2026-30939

Mitre link : CVE-2026-30939

CVE.ORG link : CVE-2026-30939

JSON object : View

Products Affected

parseplatform

parse-server

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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Prior to 8.6.13 and 9.5.1-alpha.2, 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. This vulnerability is fixed in 8.6.13 and 9.5.1-alpha.2."}, {"lang": "es", "value": "Parse Server es un backend de c\u00f3digo abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de 8.6.13 y 9.5.1-alpha.2, un atacante no autenticado puede bloquear el proceso de Parse Server al llamar a un endpoint de funci\u00f3n en la nube con un nombre de propiedad de prototipo como nombre de la funci\u00f3n. El servidor entra en recursi\u00f3n infinita, causando un error de tama\u00f1o de pila de llamadas que termina el proceso. Otros nombres de propiedades de prototipo eluden la validaci\u00f3n de despacho de funciones en la nube y devuelven respuestas HTTP 200, aunque no haya funciones en la nube definidas. Lo mismo se aplica al recorrido por notaci\u00f3n de puntos. Todas las implementaciones de Parse Server que exponen el endpoint de funci\u00f3n en la nube se ven afectadas. 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