CVE-2026-33946 in ruby-sdk

Resumen (Inglés)

MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to version 0.9.2, the Ruby SDK's streamable_http_transport.rb implementation contains a session hijacking vulnerability. An attacker who obtains a valid session ID can completely hijack the victim's Server-Sent Events (SSE) stream and intercept all real-time data. Version 0.9.2 contains a patch.

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Responsable

GitHub_M

Reservar

2026-03-24

Divulgación

2026-03-28

Estado

Confirmado

Voces

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidad	CWE	Exp	Con	CVE
353985	modelcontextprotocol ruby-sdk streamable_http_transport.rb autenticación débil	384	No está definido	Arreglo oficial	CVE-2026-33946

Fuentes

• MITRE
• NVD
• CVE Details