CVE-2026-5423

@neo4j/graphql library versions prior to 7.5.6 fail to verify the authenticity of a client-supplied, pre-decoded JWT object passed through GraphQL subscription connectionParams. As a result, any unauthenticated remote client that can open a GraphQL-over-WebSocket connection can forge arbitrary JWT claims (e.g. sub, roles) in connectionParams.jwt and have them accepted as authenticated identity for the purposes of @authentication and @subscriptionsAuthorization directive evaluation. This allows a fully unauthenticated attacker to receive subscription events that should be restricted to specific authenticated roles/users. Upgrade the library to versions 7.5.6+ or 5.12.14+. v6 is end-of-life and will not receive a fix.

CVSS

No CVSS.

References

Link	Resource
https://github.com/neo4j/graphql/security/advisories/GHSA-fcpg-3fw5-vc65
https://neo4j.com/security/CVE-2026-5423

Configurations

No configuration.

History

23 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de la biblioteca @neo4j/graphql anteriores a la 7.5.6 no verifican la autenticidad de un objeto JWT pre-decodificado suministrado por el cliente y pasado a través de los “connectionParams” de la suscripción GraphQL. Como resultado, cualquier cliente remoto no autenticado que pueda abrir una conexión GraphQL-over-WebSocket puede falsificar reclamaciones JWT arbitrarias (p. ej., ’sub’, ’roles’) en “connectionParams.jwt” y hacer que se acepten como identidad autenticada para los propósitos de la evaluación de las directivas “@authentication” y “@subscriptionsAuthorization”. Esto permite a un atacante completamente no autenticado recibir eventos de suscripción que deberían estar restringidos a roles/usuarios autenticados específicos. Actualice la biblioteca a las versiones 7.5.6+ o 5.12.14+. La v6 ha llegado al fin de su vida útil y no recibirá una corrección.

Information

Published : 2026-08-06 16:16

Updated : 2026-10-24 16:10

NVD link : CVE-2026-5423

Mitre link : CVE-2026-5423

CVE.ORG link : CVE-2026-5423

JSON object : View

Products Affected

No product.

CWE

CWE-302

Authentication Bypass by Assumed-Immutable Data

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