MAL-2026-13627
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (0d3060c9289c475e223c1c00bc21a0f59f8aa5b18e31bfaee6e4d923eab0042f)
Package published under the @nestjs-passport scope, which resembles the official @nestjs/jwt and @nestjs/passport packages. The sole entrypoint files dist/index.cjs and dist/index.js each consist of a single-line JSFuck-encoded string (~2.3MB of permutations of!+[],!![], +[]) that is passed to new Function('jose', ) and invoked at require/import time, executing hidden code in the installer's Node process every time the module is loaded. The advertised purpose is a minimal HS256 JWT helper — a task requiring only a few lines of jose calls — and the shipped TypeScript declarations expose obfuscated private field names such as _0x5f2e and _0x4b19, inconsistent with the declared tsup build tooling. The combination of scope-level typosquat, whole-module JSFuck obfuscation, and dynamic evaluation of the obfuscated body at import time is a concealment-and-execution vehicle: whatever behavior the payload performs runs inside the installer's process without any traced-readable code path.
{
"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": "dist/index.cjs",
"sha256": "a2b64d639ffaaa3784eaf995d0ed16242280c47a4647fcd34e686dcf04769be6",
"tlsh": "a3b51c0ec013e7d5f9cb55ec3ce4ae9d9b0e1e0bbaa4c76c2b4ca6974759ef06484811"
},
{
"path": "dist/index.d.ts",
"sha256": "65b212dab6b4946e63c2b0e76c1bf56558fad64f648d0eaed8c7ef11117e9b08",
"tlsh": "67f08141d8d607701c938653afda0dc6e89cf20a654cbdf9ffe280514ac340ad07156a"
}
],
"package_integrity": [
{
"filename": "jwt-1.0.7.tgz",
"hashes": {
"sha1": "848c0e11f4d19efe132d6eb356d8121202affc98",
"sha512_sri": "sha512-YbhPO2poNrFbEK0mWPHWiCsSYkf3Ys8Wr0dAQkx3qsMXq5i5Kr6yx2fulyJpgsPgY7fuY/BewNZSovHXie2lYg=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "@nestjs-passport/jwt"
},
"versions": [
"1.0.7",
"1.0.4"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-017136",
"import_time": "2026-08-07T18:23:03.462193119Z",
"modified_time": "2026-08-07T18:03:10Z",
"sha256": "0d3060c9289c475e223c1c00bc21a0f59f8aa5b18e31bfaee6e4d923eab0042f",
"source": "amazon-inspector",
"versions": [
"1.0.7"
]
},
{
"id": "IN-MAL-2026-017135",
"import_time": "2026-08-07T18:23:03.426426772Z",
"modified_time": "2026-08-07T18:02:58Z",
"sha256": "3118e2d469f173e01de26e12dca51e96b8c8e2a9c0d90d1476c3472d08f82193",
"source": "amazon-inspector",
"versions": [
"1.0.4"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (0d3060c9289c475e223c1c00bc21a0f59f8aa5b18e31bfaee6e4d923eab0042f)\nPackage published under the @nestjs-passport scope, which resembles the official @nestjs/jwt and @nestjs/passport packages. The sole entrypoint files dist/index.cjs and dist/index.js each consist of a single-line JSFuck-encoded string (~2.3MB of permutations of!+[],!![], +[]) that is passed to new Function(\u0027jose\u0027, \u003copaque body\u003e) and invoked at require/import time, executing hidden code in the installer\u0027s Node process every time the module is loaded. The advertised purpose is a minimal HS256 JWT helper \u2014 a task requiring only a few lines of jose calls \u2014 and the shipped TypeScript declarations expose obfuscated private field names such as _0x5f2e and _0x4b19, inconsistent with the declared tsup build tooling. The combination of scope-level typosquat, whole-module JSFuck obfuscation, and dynamic evaluation of the obfuscated body at import time is a concealment-and-execution vehicle: whatever behavior the payload performs runs inside the installer\u0027s process without any traced-readable code path.\n",
"id": "MAL-2026-13627",
"modified": "2026-08-07T18:24:51Z",
"published": "2026-08-07T18:02:58Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/@nestjs-passport/jwt/v/1.0.7"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/@nestjs-passport/jwt/v/1.0.4"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in @nestjs-passport/jwt (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.