mal-2026-4255
Vulnerability from ossf_malicious_packages
Published
2026-05-22 11:45
Modified
2026-05-26 05:55
Summary
Malicious code in cdk-sagemaker-notebook-workflow (npm)
Details
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (6cc9c1db01ca14b294be21438478ec14dc6549a4b7b9ec5cf73dd7aa227f7ad8)
The package declares a preinstall hook (node index.js) in package.json that fires automatically on npm install. The script collects os.hostname(), os.userInfo().username, os.platform(), current working directory, home directory, the contents of /etc/passwd (fs.readFileSync('/etc/passwd', 'utf8')), and the first 30 entries of process.env (Object.entries(process.env).slice(0, 30)), then POSTs the JSON payload to https://3nrgzlqwix6erldow0s0kttsojuai36s.oastify.com/greengrass/<execId> — a Burp Collaborator-style OAST host. Bulk env-var enumeration on CI runners typically captures AWS_SECRET_ACCESS_KEY, GITHUB_TOKEN, NPM_TOKEN, and similar credentials. The package name impersonates the AWS CDK construct namespace (cdk-sagemaker-notebook-workflow) and the README contains the string Takeover By l0bo, confirming attacker intent. This is an unambiguous install-time credential and host-data exfiltrator with a typosquat lure on the AWS CDK ecosystem.
Source: ossf-package-analysis (2f835f9a0447616b7070857544dcd2d34d3d287d213eb359769be5cc80daf3e8)
The OpenSSF Package Analysis project identified 'cdk-sagemaker-notebook-workflow' @ 2.0.5 (npm) as malicious.
It is considered malicious because:
-
The package communicates with a domain associated with malicious activity.
-
The package executes one or more commands associated with malicious behavior.
CWE
- CWE-506 - The product contains code that appears to be malicious in nature.
- CWE-506 - The product contains code that appears to be malicious in nature.
- CWE-506 - The product contains code that appears to be malicious in nature.
- CWE-506 - The product contains code that appears to be malicious in nature.
- CWE-506 - The product contains code that appears to be malicious in nature.
- CWE-506 - The product contains code that appears to be malicious in nature.
{
"affected": [
{
"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"
},
{
"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"
}
],
"indicators": {
"domains": [
"3nrgzlqwix6erldow0s0kttsojuai36s.oastify.com"
],
"evidence_files": [
{
"path": "index.js",
"sha256": "55864aa6619522f14d2d2add969cb9b1e96499659ee657c48bcf9c649a26e52a",
"tlsh": "7e414f9065f9963476f36c80f54355236b23f6023806f6e0badc038a17c9be41172ab9"
}
],
"package_integrity": [
{
"filename": "cdk-sagemaker-notebook-workflow-1.0.1.tgz",
"hashes": {
"sha1": "af3573f0c5cef33754701a396a96cb5a38d72823",
"sha512_sri": "sha512-ptM9yvYk0hwKtTCYb10zPi2BVJmvf+zgrDpK7sUUO3VWwX2RrwYnFhYbqJTyCrrQWEEAA7qx/9sPSk0/MO4PTw=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "cdk-sagemaker-notebook-workflow"
},
"versions": [
"1.0.0",
"2.0.5",
"1.0.1",
"1.0.2",
"2.0.4",
"1.0.3"
]
}
],
"credits": [
{
"contact": [
"actran@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
},
{
"contact": [
"https://github.com/ossf/package-analysis",
"https://openssf.slack.com/channels/package_analysis"
],
"name": "OpenSSF: Package Analysis",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"import_time": "2026-05-22T13:04:11.115789607Z",
"modified_time": "2026-05-22T12:00:39Z",
"sha256": "536cb79da290dd24ddd8ec1dd5fefbd6313bf5b622bbad6a9933fb3fb81bcb44",
"source": "ossf-package-analysis",
"versions": [
"1.0.0"
]
},
{
"import_time": "2026-05-24T12:30:15.409697413Z",
"modified_time": "2026-05-24T12:01:45Z",
"sha256": "2f835f9a0447616b7070857544dcd2d34d3d287d213eb359769be5cc80daf3e8",
"source": "ossf-package-analysis",
"versions": [
"2.0.5"
]
},
{
"id": "IN-MAL-2026-004197",
"import_time": "2026-05-26T05:52:07.528819488Z",
"modified_time": "2026-05-22T11:45:44Z",
"sha256": "0c452e5366df84fc79334f47faecad07d7cb21fdbcca62d5f5630ad13f6debb8",
"source": "amazon-inspector",
"versions": [
"1.0.0"
]
},
{
"id": "IN-MAL-2026-004201",
"import_time": "2026-05-26T05:52:07.997105313Z",
"modified_time": "2026-05-22T13:10:22Z",
"sha256": "0d957bae73cd17cd27ed3b594cb5063797d8c18a9dda018887a32ff8e85a3617",
"source": "amazon-inspector",
"versions": [
"1.0.1"
]
},
{
"id": "IN-MAL-2026-004504",
"import_time": "2026-05-26T05:52:43.885733761Z",
"modified_time": "2026-05-24T11:57:33Z",
"sha256": "2a051645ba8b7a584175d7063a7d4829e70025b9e2636ba6963e6ce9501cc452",
"source": "amazon-inspector",
"versions": [
"2.0.5"
]
},
{
"id": "IN-MAL-2026-004503",
"import_time": "2026-05-26T05:52:43.753952575Z",
"modified_time": "2026-05-24T11:57:33Z",
"sha256": "b81bb9433f48fe99e6eb4536ed122730a0e04b662606555519076decfc8938f4",
"source": "amazon-inspector",
"versions": [
"2.0.5"
]
},
{
"id": "IN-MAL-2026-004204",
"import_time": "2026-05-26T05:52:08.363167972Z",
"modified_time": "2026-05-22T13:22:20Z",
"sha256": "e6729c63b068cdba53c2f09a9f38f7020fefc8bb3c0fa820307feb4e8445fd9d",
"source": "amazon-inspector",
"versions": [
"1.0.2"
]
},
{
"id": "IN-MAL-2026-004501",
"import_time": "2026-05-26T05:52:43.430131324Z",
"modified_time": "2026-05-24T11:49:29Z",
"sha256": "04cfadbc867fc5da65c0084089a8c21982b7b086d0798c0c86d30b1cb22c2bb9",
"source": "amazon-inspector",
"versions": [
"2.0.4"
]
},
{
"id": "IN-MAL-2026-004196",
"import_time": "2026-05-26T05:52:07.419447356Z",
"modified_time": "2026-05-22T11:45:44Z",
"sha256": "6cc9c1db01ca14b294be21438478ec14dc6549a4b7b9ec5cf73dd7aa227f7ad8",
"source": "amazon-inspector",
"versions": [
"1.0.0"
]
},
{
"id": "IN-MAL-2026-004225",
"import_time": "2026-05-26T05:52:11.400984503Z",
"modified_time": "2026-05-22T15:24:41Z",
"sha256": "c5dbd0c88e9755ed081f0b8c96bc09e0e380eea1394b1fb3e61050ff1d67552e",
"source": "amazon-inspector",
"versions": [
"1.0.3"
]
},
{
"id": "IN-MAL-2026-004502",
"import_time": "2026-05-26T05:52:43.550244482Z",
"modified_time": "2026-05-24T11:49:29Z",
"sha256": "ff7c0a5d540e5ff3b2798858685b3bb07b0e24c9faccccd526d9331d71ad08f7",
"source": "amazon-inspector",
"versions": [
"2.0.4"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (6cc9c1db01ca14b294be21438478ec14dc6549a4b7b9ec5cf73dd7aa227f7ad8)\nThe package declares a `preinstall` hook (`node index.js`) in package.json that fires automatically on `npm install`. The script collects `os.hostname()`, `os.userInfo().username`, `os.platform()`, current working directory, home directory, the contents of `/etc/passwd` (`fs.readFileSync(\u0027/etc/passwd\u0027, \u0027utf8\u0027)`), and the first 30 entries of `process.env` (`Object.entries(process.env).slice(0, 30)`), then POSTs the JSON payload to `https://3nrgzlqwix6erldow0s0kttsojuai36s.oastify.com/greengrass/\u003cexecId\u003e` \u2014 a Burp Collaborator-style OAST host. Bulk env-var enumeration on CI runners typically captures `AWS_SECRET_ACCESS_KEY`, `GITHUB_TOKEN`, `NPM_TOKEN`, and similar credentials. The package name impersonates the AWS CDK construct namespace (`cdk-sagemaker-notebook-workflow`) and the README contains the string `Takeover By l0bo`, confirming attacker intent. This is an unambiguous install-time credential and host-data exfiltrator with a typosquat lure on the AWS CDK ecosystem.\n\n## Source: ossf-package-analysis (2f835f9a0447616b7070857544dcd2d34d3d287d213eb359769be5cc80daf3e8)\nThe OpenSSF Package Analysis project identified \u0027cdk-sagemaker-notebook-workflow\u0027 @ 2.0.5 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package communicates with a domain associated with malicious activity.\n\n- The package executes one or more commands associated with malicious behavior.\n",
"id": "MAL-2026-4255",
"modified": "2026-05-26T05:55:01Z",
"published": "2026-05-22T11:45:44Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/cdk-sagemaker-notebook-workflow/v/1.0.1"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/cdk-sagemaker-notebook-workflow/v/2.0.5"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/cdk-sagemaker-notebook-workflow/v/1.0.2"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/cdk-sagemaker-notebook-workflow/v/2.0.4"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/cdk-sagemaker-notebook-workflow/v/1.0.0"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/cdk-sagemaker-notebook-workflow/v/1.0.3"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in cdk-sagemaker-notebook-workflow (npm)"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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