GHSA-j7h9-2jh7-g967

Source

https://github.com/advisories/GHSA-j7h9-2jh7-g967

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-j7h9-2jh7-g967/GHSA-j7h9-2jh7-g967.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-j7h9-2jh7-g967

Published

2026-05-07T21:45:16Z

Modified

2026-05-21T05:15:08.446595569Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

mcp-ssh-tool has file transfer path policy bypass and bearer token comparison hardening

Details

Summary

mcp-ssh-tool has released version 2.1.1 with security hardening for transfer path authorization and HTTP bearer authentication.

The release addresses:

insufficient local path policy enforcement in transfer-related filesystem handling
incomplete canonicalization and segment-boundary handling for deny-prefix path policy checks
non-constant-time HTTP bearer token comparison

Impact

Affected versions may allow policy bypass in transfer path handling under specific configurations, and may expose a timing side channel in bearer-token comparison for HTTP deployments.

Patched Version

Upgrade to mcp-ssh-tool >= 2.1.1.

npm install -g mcp-ssh-tool@latest

Workarounds

For deployments that cannot immediately upgrade:

avoid exposing HTTP transport beyond loopback
use strict filesystem policy configuration
avoid granting MCP clients access to sensitive local transfer paths
monitor audit logs for unexpected transfer operations

Credits

Reported by dodge1218.

Database specific

{
    "nvd_published_at": null,
    "severity": "HIGH",
    "cwe_ids": [
        "CWE-208",
        "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-07T21:45:16Z"
}

References

Affected packages

npm / mcp-ssh-tool

Package

Name: mcp-ssh-tool; View open source insights on deps.dev
Purl: pkg:npm/mcp-ssh-tool

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.1.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-j7h9-2jh7-g967/GHSA-j7h9-2jh7-g967.json"

last_known_affected_version_range

"<= 2.1.0"