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SCA: security update for @arikusi/deepseek-mcp-server (GHSA-72f3-6w86-7rv3)

medium Tenable Self-Hosted Container Security Plugin ID 450445

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - DeepSeek MCP Server is an MCP server for DeepSeek V4. Starting in version 1.4.2 and prior to version
 1.8.0, the self-hosted HTTP transport of `@arikusi/deepseek-mcp-server` exposes `POST /mcp` without any
 authentication: `createMcpExpressApp` is called without an `authProvider` and no middleware guards the
 route, so any network-reachable client can issue an unauthenticated `initialize` request and obtain a
 valid MCP session identifier. In reproduced testing against commit `5e1302171e99`, an unauthenticated
 client was able to initialize a session, enumerate tools, and invoke the local `deepseek_sessions` tool
 with no credentials. The same unauthenticated session also exposes `deepseek_chat`, whose handler uses the
 server-side `DEEPSEEK_API_KEY` when self-hosted deployments configure one. This issue applies to self-
 hosted HTTP mode, not the separately documented hosted BYOK endpoint in `README.md`, which expects an
 `Authorization: Bearer ...` header. Upstream self-hosted container assets enable HTTP mode by default
 (`Dockerfile`) and publish port `3000` (`docker-compose.yml`). Version 1.8.0 contains a patch for this
 issue. (CVE-2026-55605)

Solution

Update the @arikusi/deepseek-mcp-server library and its related packages to version 1.8.0 or later.

See Also

https://github.com/advisories/GHSA-72f3-6w86-7rv3

Plugin Details

Severity: Medium

ID: 450445

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-55605

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/25/2026

Vulnerability Publication Date: 7/9/2026

Reference Information

CVE: CVE-2026-55605

cwe: CWE-306