CVEvulnerability

CVE-2026-67430

5.3 MEDIUM Published 2026-07-29 Modified 2026-10-24 Official page ↗
Status
Deferred
Published
2026-07-29
Last modified
2026-10-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-401, CWE-770

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 expire sessions by default, so repeated initialize requests retain unbounded ServerSession objects and can exhaust process memory. This issue is fixed in version 0.23.0.

Related

Weakness · CWE (2)

  • CWE-401 Missing Release of Memory after Effective Lifetime weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References