MAL-2026-5481

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mcp-server-postgres/MAL-2026-5481.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5481
Aliases
  • GHSA-vm2g-qj5x-x234
Published
2026-06-09T20:34:49Z
Modified
2026-08-20T15:30:12.065333305Z
Summary
Malicious code in mcp-server-postgres (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (f0b86cc4cf49b5d6cda37126f6a0c7c9f9fec648eb4d4743b6f39423613d3122)

Package squats the unscoped name mcp-server-postgres (impersonating the official scoped MCP postgres server). package.json declares "postinstall": "node index.js", which fires unconditionally on npm install. index.js loads os, https, and http, then POSTs a JSON body containing os.hostname(), process.cwd(), the npm user-agent, Node version, and os.platform() to a hardcoded Cloudflare Workers endpoint at https://npx-canary-log.vulnerable-live.workers.dev/log. Installers and CI systems running npm install or npx mcp-server-postgres leak host identifiers and working-directory paths to a third-party endpoint without consent. Although the author self-describes the package as a 'canary' for npx-confusion research, the typosquat name combined with unsolicited install-time host telemetry exfiltration constitutes a supply-chain attack against installers.

Source: ghsa-malware (205ca5db960964529f7a10a5683d5caef078ad5092ca98abf859a8121bede417)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-06-09T20:34:49Z",
            "sha256": "6c4d1fa0d6fdf2966637bf91c161f3c063aa675eeca88bd0f9abf002c51070c6",
            "versions": [
                "0.0.1"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-005231",
            "import_time": "2026-06-09T20:45:57.509546196Z"
        },
        {
            "sha256": "ee78fcc5f02c57d736d4788fc916c776b9db61a18edad8291254ad697763f597",
            "source": "amazon-inspector",
            "versions": [
                "0.0.1"
            ],
            "modified_time": "2026-06-09T20:34:50Z",
            "id": "IN-MAL-2026-005232",
            "import_time": "2026-06-09T20:45:57.599849438Z"
        },
        {
            "id": "IN-MAL-2026-006022",
            "modified_time": "2026-06-12T19:07:29Z",
            "versions": [
                "0.0.2"
            ],
            "source": "amazon-inspector",
            "import_time": "2026-06-12T19:43:59.235102535Z",
            "sha256": "083002f0c966dc86b847b4a40733a705c82249bbdad0d7f3fef8861f58f983f1"
        },
        {
            "source": "amazon-inspector",
            "modified_time": "2026-06-12T19:07:27Z",
            "versions": [
                "0.0.2"
            ],
            "sha256": "f0b86cc4cf49b5d6cda37126f6a0c7c9f9fec648eb4d4743b6f39423613d3122",
            "id": "IN-MAL-2026-006019",
            "import_time": "2026-06-12T19:43:58.903981438Z"
        },
        {
            "sha256": "205ca5db960964529f7a10a5683d5caef078ad5092ca98abf859a8121bede417",
            "source": "ghsa-malware",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "modified_time": "2026-08-20T14:25:56Z",
            "id": "GHSA-vm2g-qj5x-x234",
            "import_time": "2026-08-20T15:26:15.543163865Z"
        }
    ]
}
References
Credits

Affected packages

npm / mcp-server-postgres

Package

Name
mcp-server-postgres
View open source insights on deps.dev
Purl
pkg:npm/mcp-server-postgres

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.0.1
0.0.2

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mcp-server-postgres/MAL-2026-5481.json"
indicators 
{
    "domains": [
        "npx-canary-log.vulnerable-live.workers.dev"
    ],
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "7e44b21be634b28a9772004faf455a933349127afe559353d0e7e61dccdbbb7b",
            "tlsh": "6c3195e180f805351fee46d3e2e9a899a36ff126360778f0b49e02295fc90980771cd2"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha1": "619d5e7a8cf71d7cbf29b260f406442286c4935f",
                "sha512_sri": "sha512-IxhzDulWucT/bRAY4fo07EpNfusWdSz1iCwmawMrlUeIJXbovHCwDa8qq04xY2w8EYWvE/SjiCIbyl6PuqVS2Q=="
            },
            "filename": "mcp-server-postgres-0.0.1.tgz"
        }
    ]
}