CVE-2026-5423Subscription Authentication Bypass via Unverified connectionParams.jwt
Updated under an hour ago ()
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It affects neo4j graphql. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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@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
- 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-302
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Neo4j
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
neo4j graphql neo4j:graphql (from the name) | from 7.0.0 before 7.5.6; from 5.0.0 before 5.12.14; from 6.0.0 through 6.6.4 | CNA record |
References
- https://neo4j.com/security/CVE-2026-5423vendor-advisory
- https://github.com/neo4j/graphql/security/advisories/GHSA-fcpg-3fw5-vc65third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.