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

No history.

Information

Published : 2026-08-06 16:16

Updated : 2026-08-18 15:04

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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