CVEvulnerability

CVE-2025-6515

6.8 MEDIUM Published 2025-10-20 Modified 2026-10-08 Official page ↗
Status
Deferred
Published
2025-10-20
Last modified
2026-10-08
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.8 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
Weaknesses
CWE-330

Description

The MCP SSE endpoint in oatpp-mcp returns an instance pointer as the session ID, which is not unique nor cryptographically secure. This allows network attackers with access to the oatpp-mcp server to guess future session IDs and hijack legitimate client MCP sessions, returning malicious responses from the oatpp-mcp server.

Related

Weakness · CWE (1)

  • CWE-330 Use of Insufficiently Random Values weakness

References