CVE-2026-63118

MEDIUM

6.9

CVSS Severity Score

EPSS Score0.0000%

EPSS Percentile0.00th

Published2026-07-29

Last Modified2026-07-29

Data SourcesNVD

Vulnerability Description

MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to 0.23.0, MCP::Server::Transports::StreamableHTTPTransport in the mcp gem does not validate the HTTP Host or Origin request headers, which allows a malicious browser page to use DNS rebinding to reach a locally running MCP server and invoke exposed tools. This issue is fixed in version 0.23.0.

Affected Platforms (CPE)

No CPE configurations currently published for this record.

References & Advisories

🔗 https://github.com/modelcontextprotocol/ruby-sdk/commit/ba543083a7594e7892b29464b89091816446ff7a

🔗 https://github.com/modelcontextprotocol/ruby-sdk/releases/tag/v0.23.0

🔗 https://github.com/modelcontextprotocol/ruby-sdk/security/advisories/GHSA-rjr6-rcgv-9m7m

Vulnerability Description

Affected Platforms (CPE)

References & Advisories

関連する脆弱性情報