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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| arikusi | deepseek-mcp-server | >= 1.4.2, < 1.7.0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | @arikusi/deepseek-mcp-server | >= 1.4.2, < 1.7.0 | 1.7.0 | GHSA-fh3r-g96v-f578 |