MAL-2026-5320

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/openai-mcp/MAL-2026-5320.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5320
Aliases
Published
2026-06-08T10:18:12Z
Modified
2026-07-09T23:02:07Z
Summary
Malicious code in openai-mcp (PyPI)
Details

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

Source: amazon-inspector (6c30f8b1a160c72529e2671b81be13ea671302e9bc3915ee84bd2212e0fdd5a3)

The package name and module structure impersonate the official openai Python SDK (the package even rewrites exported classes' __module__ attribute to "openai" in openai_mcp/__init__.py). Alongside the cloned SDK, it ships openai-setup.pth, which Python auto-loads on every interpreter start. The.pth file contains a single-line, heavily aliased exec() payload (single-letter names like _O, _T, _u, _s, _b, _z) that: (1) checks a one-shot guard /tmp/.bun_ran, (2) downloads the Bun JavaScript runtime from https://github.com/oven-sh/bun/releases/download/bun-v1.3.13/bun-<platform>-<arch>.zip to /tmp/b/bun and chmods it executable, (3) locates a sibling _index.js on sys.path, and (4) runs bun run _index.js. Because.pth files execute at every Python startup (not just at install), every python invocation after pip install openai-mcp downloads an alien runtime and executes the package's JavaScript payload through it — an alternate-runtime dropper that evades Python-only scanners. The obfuscation, one-shot guard, identity spoofing, and runtime-laundering together establish clear malicious intent.

Source: kam193 (f7597f40e5a7af25ae5f07e34310df24ac3284b9e0cadcb013a9c155384e9100)

Typosquatting package published from a compromised account with an embedded infostealer. The infostealer is a heavily obfuscated JavaScript code executed using Bun runtime on Python startup. It collects all kinds of sensitive data, including API keys, credentials to package repositories, cryptocurrency assets, password manager data. Infostealer actively queries online services to collect additional secrets as well as attempts to gain persistence and spread further by publishing infected packages using collected credentials. Data are exfiltrated likely using Github. The code seems to threaten to wipe the user's data if it detects invalid GitHub tokens. Cleanup should be done with caution.

It seems to be related to the recent Mini Shai Hulud campaign.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-06-compr-woodpecker

Reasons (based on the campaign):

  • compromised-package

  • exfiltration-env-variables

  • exfiltration-cloud-tokens

  • exfiltration-credentials

  • abuses-pth

  • obfuscation

  • infostealer

  • The package contains code to detect if it is running in a sandbox environment.

  • exfiltration-crypto

  • files-exfiltration

  • destructive-actions

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "pypi/2026-06-compr-woodpecker/openai-mcp",
            "import_time": "2026-06-08T11:41:02.54656078Z",
            "modified_time": "2026-06-08T10:18:12.243859Z",
            "sha256": "f7597f40e5a7af25ae5f07e34310df24ac3284b9e0cadcb013a9c155384e9100",
            "source": "kam193",
            "versions": [
                "2.41.1",
                "2.41.2"
            ]
        },
        {
            "id": "pypi/2026-06-compr-woodpecker/openai-mcp",
            "import_time": "2026-06-09T07:48:29.65920735Z",
            "modified_time": "2026-06-08T10:18:12.243859Z",
            "sha256": "a230c4f21adcef632bb3c8fcf647b47ea074ba8b050cab7ca50062fc25b980bf",
            "source": "kam193",
            "versions": [
                "2.41.1",
                "2.41.2"
            ]
        },
        {
            "id": "IN-MAL-2026-005694",
            "import_time": "2026-06-11T07:49:41.922345727Z",
            "modified_time": "2026-06-11T07:18:37Z",
            "sha256": "6c30f8b1a160c72529e2671b81be13ea671302e9bc3915ee84bd2212e0fdd5a3",
            "source": "amazon-inspector",
            "versions": [
                "2.41.1"
            ]
        },
        {
            "id": "IN-MAL-2026-009522",
            "import_time": "2026-07-09T22:56:30.750145051Z",
            "modified_time": "2026-07-09T22:07:56Z",
            "sha256": "8b7f7a8f8c0ae2e9944eb8e4ab5264a8ad8c499cf5f85745ec75ec08f590a924",
            "source": "amazon-inspector",
            "versions": [
                "2.41.2"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / openai-mcp

Package

Name
openai-mcp
View open source insights on deps.dev
Purl
pkg:pypi/openai-mcp

Affected ranges

Affected versions

2.*
2.41.1
2.41.2

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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "openai-setup.pth",
            "sha256": "6506d31707a39949f89534bf9705bcf889f1ecae3dbc6f4ff88d67a8be3d01b2",
            "tlsh": "8721015780038160da72d627cb2929f4278b0cbb4e538b1b8de8d9c172d0d1197b6b48"
        },
        {
            "path": "openai_mcp/__init__.py",
            "sha256": "f8eba7aafc46f204c266493e54a50de3699375e8643081c5b18390e5328108b1",
            "tlsh": "b2522058ab15fa37d4918ae0da53d511c72598c38e023ab9379d01f91f1ba2ed9f838c"
        }
    ],
    "package_integrity": [
        {
            "filename": "openai_mcp-2.41.1-py3-none-any.whl",
            "hashes": {
                "blake2b_256": "ac5d310d6104cd15ada46c4bdc20a4e8636df5ecaff9d712aa05f1c1f6b513e7",
                "md5": "38f74025b26c1d96d8dbd1e6641f29df",
                "sha256": "3d04b9631c921da2454a566a8882a96641af8ad58a9c6b9882bd029dcf7d00d4"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/openai-mcp/MAL-2026-5320.json"