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TI-2026-04749 Aliases CVE-2026-5423

Subscription Authentication Bypass via Unverified connectionParams.jwt

Priority LOW 36CWE-302Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

@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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00586 48th percentileScored 2026-11-07
Fix Fixed graphql (neo4j): 7.5.6, 5.12.14

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
neo4jgraphql7.0.0 to before 7.5.6; 5.0.0 to before 5.12.14; 6.0.0 – 6.6.47.5.6, 5.12.14Patch availableCNA
  • graphql Vendorneo4j Affected 7.0.0 to before 7.5.6; 5.0.0 to before 5.12.14; 6.0.0 – 6.6.4 Fixed in 7.5.6, 5.12.14 Patch available CNA

Remediation

  • Fix · CNA graphql (neo4j) Fixed in 7.5.6, 5.12.14

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5423

References

Advisory 2

  • TI-2021-13406 Neo4j through 3.4.18 (with the shell server enabled) exposes an RMI service that… CVSS 3.1CRITICAL 9.8
  • TI-2026-71015 Authentication ignored for top-level @cypher fields in @neo4j/graphql CVSS 4.0CRITICAL 9.3
  • TI-2018-16042 neo4j-contrib neo4j-apoc-procedures version before commit 45bc09c contains a XML External… CVSS 3.0CRITICAL 10.0
  • TI-2018-13005 Due to incorrect access control in Neo4j Enterprise Database Server 3.4.x before 3.4.9… CVSS 3.0CRITICAL 9.8
  • TI-2021-18971 A directory traversal vulnerability in the apoc plugins in Neo4J Graph database before… CVSS 3.1CRITICAL 9.1
  • TI-2026-01049 Insufficient escaping of unicode characters in query log CVSS 4.0LOW 1.1
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences