CVE-2026-30241 in mercurius

Sumário (Inglês)

Mercurius is a GraphQL adapter for Fastify. Prior to version 16.8.0, Mercurius fails to enforce the configured queryDepth limit on GraphQL subscription queries received over WebSocket connections. The depth check is correctly applied to HTTP queries and mutations, but subscription queries are parsed and executed without invoking the depth validation. This allows a remote client to submit arbitrarily deeply nested subscription queries over WebSocket, bypassing the intended depth restriction. On schemas with recursive types, this can lead to denial of service through exponential data resolution on each subscription event. This issue has been patched in version 16.8.0.

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Responsável

GitHub_M

Reservar

04/03/2026

Divulgação

07/03/2026

Estado

Confirmado

Inscrições

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidade	CWE	Exp	Con	CVE
349591	mercurius-js mercurius GraphQL Subscription Elevação de Privilégios	863	Não definido	Correção oficial	CVE-2026-30241

Fontes

• MITRE
• NVD
• CVE Details