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CVE-2026-34363

Estado: AnalizadaAlta (8.2)—

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.65 and 9.7.0-alpha.9, when multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber's filter removes a protected field, subsequent subscribers may receive the already-filtered object.

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This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object. Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber's trigger modifications can leak to other subscribers through the same shared mutable state. Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class. This issue has been patched in versions 8.6.65 and 9.7.0-alpha.9.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:N permite acceso remoto sin privilegios (T1190). LiveQuery expone datos protegidos y credenciales a clientes no autorizados por race condition (CWE-362), impactando lectura de datos sensibles (T1005) y credenciales (T1212).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Application Isolation and SandboxingExploit ProtectionUpdate SoftwareApplication Developer GuidanceVulnerability ScanningThreat Intelligence Program

Tecnologías afectadas (1)

Parseplatform — Parse-server

CWE

Referencias

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      "value": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.65 and 9.7.0-alpha.9, when multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber's filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object. Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber's trigger modifications can leak to other subscribers through the same shared mutable state. Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class. This issue has been patched in versions 8.6.65 and 9.7.0-alpha.9."
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      "value": "Parse Server es un backend de código abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de las versiones 8.6.65 y 9.7.0-alpha.9, cuando múltiples clientes se suscriben a la misma clase a través de LiveQuery, los manejadores de eventos procesan a cada suscriptor concurrentemente utilizando objetos mutables compartidos. El filtro de datos sensibles modifica estos objetos compartidos in situ, así, cuando el filtro de un suscriptor elimina un campo protegido, los suscriptores posteriores pueden recibir el objeto ya filtrado. Esto puede causar que campos protegidos y datos de autenticación se filtren a clientes que no deberían verlos, o causar que los clientes que sí deberían ver los datos reciban un objeto incompleto. Además, cuando se registra un disparador afterEvent de Cloud Code, las modificaciones del disparador de un suscriptor pueden filtrarse a otros suscriptores a través del mismo estado mutable compartido. Cualquier despliegue de Parse Server que utilice LiveQuery con campos protegidos o disparadores afterEvent se ve afectado cuando múltiples clientes se suscriben a la misma clase. Este problema ha sido parcheado en las versiones 8.6.65 y 9.7.0-alpha.9."
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  "lastModified": "2026-07-24T21:10:00.143",
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