CVE-2026-55604

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Source
https://cve.org/CVERecord?id=CVE-2026-55604
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55604.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55604
Aliases
Published
2026-07-09T21:13:15Z
Modified
2026-10-21T02:58:38Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L CVSS Calculator
Summary
@arikusi/deepseek-mcp-server has an Authorization Bypass Through User-Controlled Key
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-639"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55604.json"
}
References

Affected packages

Git / github.com/arikusi/deepseek-mcp-server

Affected ranges

Type
GIT
Repo
https://github.com/arikusi/deepseek-mcp-server
Events
Introduced
1f90faae26935a7c16efaaf7e8251d551efae2c0
Fixed
9fd514292d23d59ca1434b01f019aca6ef4356f9
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.4.2"
                },
                {
                    "fixed":  "1.7.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "original_tag":  "v1.7.0",
            "range":  [
                {
                    "fixed":  "9fd514292d23d59ca1434b01f019aca6ef4356f9"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v1.*
v1.4.2
v1.4.3
v1.5.0
v1.5.1
v1.5.2
v1.6.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55604.json"