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P4
CVE-2026-55604: deepseek-mcp-server >= 1.4.2, < 1.7.0
CVE-2026-55604. CVSS 3.1 base score 8.6 (HIGH, Vendor/CNA). EPSS 0.00372 (percentile 0.30045), scored 24-Oct-2026.
Affected technology
deepseek-mcp-server · >= 1.4.2, < 1.7.0
arikusi
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
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. Vendor/CNA’s CVSS 3.1 assessment (base score 8.6/10) rates confidentiality impact as high; integrity and availability impact as low.
- CWE
- CWE-639
- CCR priority
- 34.5 /100 (P4)
- CVSS 3.1
- 8.6 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L · Vendor/CNA
- EPSS
- 0.00372 · percentile 0.30915 · 2026-10-25
- KEV
- no
Provenance
- FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-55604.html