CVE-2026-32770

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.19 and 8.6.43, a remote attacker can crash the Parse Server by subscribing to a LiveQuery with an invalid regular expression pattern. The server process terminates when the invalid pattern reaches the regex engine during subscription matching, causing denial of service for all connected clients. The fix in 9.6.0-alpha.19 and 8.6.43 validates regular expression patterns at subscription time, rejecting invalid patterns before they are stored. Additionally, a defense-in-depth try-catch prevents any subscription matching error from crashing the server process. As a workaround, disable LiveQuery if it is not needed.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

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/pull/10197	Issue Tracking
https://github.com/parse-community/parse-server/pull/10199	Issue Tracking
https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86c	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:9.6.0:alpha1::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha6::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha7::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha8::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha9::::node.js::*

History

17 Jun 2026, 10:36

Type	Values Removed	Values Added
Summary		(es) Parse Server es un backend de código abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de 9.6.0-alpha.19 y 8.6.43, un atacante remoto puede provocar la caída del Parse Server al suscribirse a un LiveQuery con un patrón de expresión regular inválido. El proceso del servidor termina cuando el patrón inválido llega al motor de expresiones regulares durante la coincidencia de suscripción, causando denegación de servicio para todos los clientes conectados. La corrección en 9.6.0-alpha.19 y 8.6.43 valida los patrones de expresiones regulares en el momento de la suscripción, rechazando patrones inválidos antes de que sean almacenados. Además, un try-catch de defensa en profundidad evita que cualquier error de coincidencia de suscripción provoque la caída del proceso del servidor. Como solución alternativa, deshabilite LiveQuery si no es necesario.

19 Mar 2026, 17:32

Type	Values Removed	Values Added
References	~~() https://github.com/parse-community/parse-server/pull/10197 -~~	() https://github.com/parse-community/parse-server/pull/10197 - Issue Tracking
References	~~() https://github.com/parse-community/parse-server/pull/10199 -~~	() https://github.com/parse-community/parse-server/pull/10199 - Issue Tracking
References	~~() https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86c -~~	() https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86c - Vendor Advisory
First Time		Parseplatform Parseplatform parse-server
CPE		cpe:2.3:a:parseplatform:parse-server::::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha7::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha6::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha8::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha9::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4::::node.js::* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2::::node.js::*

18 Mar 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-18 22:16

Updated : 2026-06-17 10:36

NVD link : CVE-2026-32770

Mitre link : CVE-2026-32770

CVE.ORG link : CVE-2026-32770

JSON object : View

Products Affected

parseplatform

parse-server

CWE

CWE-248

Uncaught Exception

5.9 /10