Security Advisory

CVE-2026-55604

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-09 21:13:15

Last updated 2026-07-10 14:42:09

Assigner GitHub_M

CVSS score 8.6

State PUBLISHED

Description

DeepSeek MCP Server is an MCP server for DeepSeek V4. Starting in version 1.4.2 and prior to version 1.7.0, the process-global `SessionStore` accepts caller-supplied `session_id` values without binding them to any authenticated principal or transport session. An attacker can enumerate active session IDs via `deepseek_sessions`, then reuse a victim-controlled `session_id` in `deepseek_chat` to retrieve and continue the victim's conversation context. Version 1.7.0 contains a patch.

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