mal-2026-12421
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (b4f92e3ecba043a713f37e35f3162b1454e17991b2860c0923a6aa8fced87c6d)
On require('pvm-autodoc'), index.js loads bridge.js which downloads a platform-specific native binary from one of four hardcoded Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT base64 chunked fallback under *.dl.well1.site. The destination hostnames are constructed by string-splitting and joining at runtime to evade static analysis. The fetched bytes are written to /var/tmp/.cache on POSIX or %TEMP%\dotnet_diag_.exe on Windows (a name mimicking a Microsoft diagnostic tool), chmod 0755'd, and spawned detached via /bin/sh -c or cmd /c start. Opt-out variables and file naming are framed as 'analytics'/'telemetry' while the actual behavior is fetch-and-execute of an unpinned, unverified opaque native binary. A second file, lib/telemetry.js, is shipped in the tarball with the same fetch-decode-chmod-spawn primitives using concatenated API names ('child_'+'process', 'chmod'+'Sync') as a companion payload.
Source: ghsa-malware (407a5375877220239a322683461f343d08a1566ebd5ba3c0b8056af2729f8bb3)
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.
{
"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"
}
],
"indicators": {
"evidence_files": [
{
"path": "_bridge.js",
"sha256": "2714f2e23921bae271d73662417e6559930a3ccd1ff12b6ee361a929f419d33b",
"tlsh": "9aa197aa02aa701847b09be5c7175415fa6bf6a33380c2d4fb5ca5985f761248272efc"
},
{
"path": "lib/telemetry.js",
"sha256": "a8cb7c28d4860cbd9bcfef3e8f4ce477839a2ef5402d2d8b87c6e1ee5c16b6d6",
"tlsh": "ba835055566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
}
],
"package_integrity": [
{
"filename": "pvm-autodoc-20.4.6.tgz",
"hashes": {
"sha1": "bbdb33b378395a5251f0dfed96a47a8fbcefcd2a",
"sha512_sri": "sha512-ughJpprwifYByNIg+tGzouNCHoYunDysXbGJ2QlsNcQ4LcV1ZyNaWOgWF0Q/m/+tt74p4tvYBgXYonTgG+Pf1Q=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "pvm-autodoc"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "SEMVER"
}
],
"versions": [
"20.4.6"
]
}
],
"aliases": [
"GHSA-9352-468r-x8fr"
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-014687",
"import_time": "2026-08-05T13:08:37.565797424Z",
"modified_time": "2026-08-05T12:31:04Z",
"sha256": "b4f92e3ecba043a713f37e35f3162b1454e17991b2860c0923a6aa8fced87c6d",
"source": "amazon-inspector",
"versions": [
"20.4.6"
]
},
{
"id": "GHSA-9352-468r-x8fr",
"import_time": "2026-08-21T11:24:15.712139964Z",
"modified_time": "2026-08-21T11:22:20Z",
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "SEMVER"
}
],
"sha256": "407a5375877220239a322683461f343d08a1566ebd5ba3c0b8056af2729f8bb3",
"source": "ghsa-malware"
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (b4f92e3ecba043a713f37e35f3162b1454e17991b2860c0923a6aa8fced87c6d)\nOn require(\u0027pvm-autodoc\u0027), index.js loads _bridge.js which downloads a platform-specific native binary from one of four hardcoded Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT base64 chunked fallback under *.dl.well1.site. The destination hostnames are constructed by string-splitting and joining at runtime to evade static analysis. The fetched bytes are written to /var/tmp/.cache_\u003chex\u003e on POSIX or %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows (a name mimicking a Microsoft diagnostic tool), chmod 0755\u0027d, and spawned detached via /bin/sh -c or cmd /c start. Opt-out variables and file naming are framed as \u0027analytics\u0027/\u0027telemetry\u0027 while the actual behavior is fetch-and-execute of an unpinned, unverified opaque native binary. A second file, lib/telemetry.js, is shipped in the tarball with the same fetch-decode-chmod-spawn primitives using concatenated API names (\u0027child_\u0027+\u0027process\u0027, \u0027chmod\u0027+\u0027Sync\u0027) as a companion payload.\n\n## Source: ghsa-malware (407a5375877220239a322683461f343d08a1566ebd5ba3c0b8056af2729f8bb3)\nAny 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.\n",
"id": "MAL-2026-12421",
"modified": "2026-08-21T11:26:13.581044345Z",
"published": "2026-08-05T12:31:04Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/pvm-autodoc/v/20.4.6"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-9352-468r-x8fr"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in pvm-autodoc (npm)"
}
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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.