cvedb.io
CVE-2026-55604
HIGH · CVSS 8.6
EPSS exploitation probability: 0%
Published 2026-07-09T22:17:06.247 · Last modified 2026-07-09T22:17:06.247

Summary

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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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.