mal-2026-10177
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (ade6fb9a07c6f1417e9569af48b6c638bf12fba7540493b1b38a2d6ba42d101c)
@jaymara/jsononifier@1.0.2 is advertised as a JSON formatting utility but ships a covert command-execution primitive that fires on require. index.js loads trigger.js, which checks for sandbox indicators (process.env.CI==='true', NODE_ENV==='test', existence of /.dockerenv) and the platform (win32); when those checks indicate a real Windows workstation, it schedules Executer.js via process.nextTick + setTimeout(5000). Executer.js XOR-decodes a byte array from payload.js using key 'xorkey123' and passes the resulting string to child_process.exec with { windowsHide: true }. payload.js openly comments the intent ('XOR-encoded command – not visible in source'). The current decoded value is a demo (calc.exe), but the mechanism — opaque encoded bytes decoded at runtime and handed to exec, gated to skip CI/test/Docker and only fire on real victim machines — is the attack: a future tarball can swap the byte array for any command without changing the visible code. None of this is required by, or consistent with, a JSON formatter.
{
"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"
}
],
"indicators": {
"evidence_files": [
{
"path": "index.js",
"sha256": "57beb8d9e87117a970ba48b458621c41ff8ec59456bd89af5d3f836679d5675d",
"tlsh": "1ae07d41c9e1e08a3c6865e9dcd4c26257d6da0d380aa193e9c443e129c2cc80b32f79"
},
{
"path": "package.json",
"sha256": "9cd202b0bf5c652512584cdbe56f30f35fb722eb2bfdc2c8db9c26d753f13330",
"tlsh": "73f0e574853159730ac8b9a69deac14775664e4f4184bc0a67d3006c438eaaa05ff32d"
}
],
"package_integrity": [
{
"filename": "jsononifier-1.0.0.tgz",
"hashes": {
"sha1": "7edf5a5bfb76b8d7c37354078fc83053b6c31f9a",
"sha512_sri": "sha512-bfebzd/Z6wvIKataAAAPyvwmKyU5XEuf/hPYjVkMkDHIQaAny/R+cJXquxJC84Ov/BchJOyqUEjmni8OUZz//w=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "@jaymara/jsononifier"
},
"versions": [
"1.0.0",
"1.0.2",
"1.0.1"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-009717",
"import_time": "2026-07-10T21:50:33.089783497Z",
"modified_time": "2026-07-10T21:29:53Z",
"sha256": "7d4826185eb8033f7f55a85e760d0acb0425b463ce1ec95af4c1ae9f6d2ce05b",
"source": "amazon-inspector",
"versions": [
"1.0.0"
]
},
{
"id": "IN-MAL-2026-009715",
"import_time": "2026-07-10T21:50:32.787378748Z",
"modified_time": "2026-07-10T21:29:35Z",
"sha256": "ade6fb9a07c6f1417e9569af48b6c638bf12fba7540493b1b38a2d6ba42d101c",
"source": "amazon-inspector",
"versions": [
"1.0.2"
]
},
{
"id": "IN-MAL-2026-009716",
"import_time": "2026-07-10T21:50:32.951506235Z",
"modified_time": "2026-07-10T21:29:46Z",
"sha256": "bad937211c6f3e71e5b1d13c7d85c5c7188db6fd5df39ec3d1216668e3b6a009",
"source": "amazon-inspector",
"versions": [
"1.0.1"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (ade6fb9a07c6f1417e9569af48b6c638bf12fba7540493b1b38a2d6ba42d101c)\n@jaymara/jsononifier@1.0.2 is advertised as a JSON formatting utility but ships a covert command-execution primitive that fires on require. index.js loads trigger.js, which checks for sandbox indicators (process.env.CI===\u0027true\u0027, NODE_ENV===\u0027test\u0027, existence of /.dockerenv) and the platform (win32); when those checks indicate a real Windows workstation, it schedules Executer.js via process.nextTick + setTimeout(5000). Executer.js XOR-decodes a byte array from payload.js using key \u0027xorkey123\u0027 and passes the resulting string to child_process.exec with { windowsHide: true }. payload.js openly comments the intent (\u0027XOR-encoded command \u2013 not visible in source\u0027). The current decoded value is a demo (calc.exe), but the mechanism \u2014 opaque encoded bytes decoded at runtime and handed to exec, gated to skip CI/test/Docker and only fire on real victim machines \u2014 is the attack: a future tarball can swap the byte array for any command without changing the visible code. None of this is required by, or consistent with, a JSON formatter.\n",
"id": "MAL-2026-10177",
"modified": "2026-07-10T21:52:12Z",
"published": "2026-07-10T21:29:35Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/@jaymara/jsononifier/v/1.0.0"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/@jaymara/jsononifier/v/1.0.2"
},
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/@jaymara/jsononifier/v/1.0.1"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in @jaymara/jsononifier (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.