MAL-2026-4760
Vulnerability from ossf_malicious_packages
Published
2026-05-21 10:47
Modified
2026-05-21 10:47
Summary
Malicious code in nvidia-nat-semantic-kernel (PyPI)
Details
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (fd31ef3bb7acb152519e55b43037368e8dfc21d444050bec7739778c4ce73381)
The wheel's METADATA declares a hard dependency Requires-Dist: ruamel-yaml-clibz==0.3.5. The legitimate upstream is ruamel.yaml.clib (with dots) maintained as part of the ruamel.yaml project; ruamel-yaml-clibz (note trailing 'z', hyphenated form) is not a recognized ruamel artifact and has the shape of a typosquat. Installing this package causes pip to resolve and install ruamel-yaml-clibz from PyPI, executing whatever build/install code that package ships. The flagged package's own source is otherwise a benign NVIDIA NeMo Agent Toolkit semantic-kernel integration with no network, exec, or credential-handling behavior — the installer-side risk is entirely in the transitive pull.
CWE
- CWE-506 - The product contains code that appears to be malicious in nature.
Credits
{
"affected": [
{
"database_specific": {
"cwes": [
{
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature.",
"name": "Embedded Malicious Code"
}
],
"indicators": {
"evidence_files": [
{
"path": "nvidia_nat_semantic_kernel-1.8.0a20260521.dist-info/METADATA",
"sha256": "40cdbeb77ef82d1a17fef0745c9d3949943788c6af73ab2d186aafba34232d4b",
"tlsh": "ad4165a52a850afa3bc108c77b8d591ad19aca0ce74e18e5f5e5c1c542ac77283fc0bd"
}
],
"package_integrity": [
{
"filename": "nvidia_nat_semantic_kernel-1.8.0a20260521-py3-none-any.whl",
"hashes": {
"blake2b_256": "5d2e1abdc5dbba5c91506af481af0149c0d80161c31e73508a9d27c57dd56bcd",
"md5": "83c6ac5c5c9ce3ea59d7aaca4651bdf1",
"sha256": "ccae67168c818fbc122454565bd1498f8b4dcfca534b6dc9b9a86af8b8110f39"
}
}
]
}
},
"package": {
"ecosystem": "PyPI",
"name": "nvidia-nat-semantic-kernel"
},
"versions": [
"1.8.0a20260521"
]
}
],
"credits": [
{
"contact": [
"actran@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-003799",
"import_time": "2026-05-26T05:51:20.196367971Z",
"modified_time": "2026-05-21T10:47:05Z",
"sha256": "fd31ef3bb7acb152519e55b43037368e8dfc21d444050bec7739778c4ce73381",
"source": "amazon-inspector",
"versions": [
"1.8.0a20260521"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (fd31ef3bb7acb152519e55b43037368e8dfc21d444050bec7739778c4ce73381)\nThe wheel\u0027s METADATA declares a hard dependency `Requires-Dist: ruamel-yaml-clibz==0.3.5`. The legitimate upstream is `ruamel.yaml.clib` (with dots) maintained as part of the ruamel.yaml project; `ruamel-yaml-clibz` (note trailing \u0027z\u0027, hyphenated form) is not a recognized ruamel artifact and has the shape of a typosquat. Installing this package causes pip to resolve and install `ruamel-yaml-clibz` from PyPI, executing whatever build/install code that package ships. The flagged package\u0027s own source is otherwise a benign NVIDIA NeMo Agent Toolkit semantic-kernel integration with no network, exec, or credential-handling behavior \u2014 the installer-side risk is entirely in the transitive pull.\n",
"id": "MAL-2026-4760",
"modified": "2026-05-21T10:47:05Z",
"published": "2026-05-21T10:47:05Z",
"references": [
{
"type": "PACKAGE",
"url": "https://pypi.org/project/nvidia-nat-semantic-kernel/1.8.0a20260521/"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in nvidia-nat-semantic-kernel (PyPI)"
}
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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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