MAL-2026-13604
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (6b8426c39ffcba11d95e8ede8085ce260dbcf8527544ce9ca3a1d7a59618f0eb)
On require of the package's main entry, lib/utils.min.js queries Ethereum RPC endpoints (eth.blockscout.com/api, 1rpc.io/eth, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) for the latest outbound transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, parses two IPv4 C2 hosts from the transaction's to field, fetches an XOR-encoded JavaScript payload over plain HTTP at http://<ip>:443/0x/cls, decodes it, and executes it via both eval and a detached spawn('node', ['-e', payload]). Sensitive identifiers (http, https, child_process, zlib, url, URLs, HTTP methods, header names, the attacker address) are hidden behind \uXXXX unicode escapes, and the response body and x-payload-b64 header are XOR-decoded with a per-URL key before execution. The package is presented as a Tailwind CSS plugin and has no legitimate need for Ethereum RPC access, IP derivation from on-chain data, or execution of remotely fetched code.
- 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"
}
],
"indicators": {
"evidence_files": [
{
"path": "lib/utils.min.js",
"sha256": "bb2f325edfc3e4383d88b985aa203f13d238612dd0487405e808dc9cf64720e3",
"tlsh": "d4021ea05379adba82315a44cc34be0de1b4dcb56d4bd02af82b3c89dd7a1d08b9176c"
}
],
"package_integrity": [
{
"filename": "tailwindcss-motion-advanced-1.0.1.tgz",
"hashes": {
"sha1": "1ce4726fe123faf79f41407b1583c4e7b4926a81",
"sha512_sri": "sha512-M1xGRmzww82urGhMmdnomkXC6i9fFGjwDAgjV2jbA0cPcoSOQf34qTxLkfbwUptGeW8nN/IFXaXdbeYXI5cQtg=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "tailwindcss-motion-advanced"
},
"versions": [
"1.0.1"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-017004",
"import_time": "2026-08-07T12:51:21.825236508Z",
"modified_time": "2026-08-07T12:29:45Z",
"sha256": "6b8426c39ffcba11d95e8ede8085ce260dbcf8527544ce9ca3a1d7a59618f0eb",
"source": "amazon-inspector",
"versions": [
"1.0.1"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (6b8426c39ffcba11d95e8ede8085ce260dbcf8527544ce9ca3a1d7a59618f0eb)\nOn require of the package\u0027s main entry, lib/utils.min.js queries Ethereum RPC endpoints (eth.blockscout.com/api, 1rpc.io/eth, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) for the latest outbound transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, parses two IPv4 C2 hosts from the transaction\u0027s `to` field, fetches an XOR-encoded JavaScript payload over plain HTTP at `http://\u003cip\u003e:443/0x/cls`, decodes it, and executes it via both `eval` and a detached `spawn(\u0027node\u0027, [\u0027-e\u0027, payload])`. Sensitive identifiers (`http`, `https`, `child_process`, `zlib`, `url`, URLs, HTTP methods, header names, the attacker address) are hidden behind \\uXXXX unicode escapes, and the response body and `x-payload-b64` header are XOR-decoded with a per-URL key before execution. The package is presented as a Tailwind CSS plugin and has no legitimate need for Ethereum RPC access, IP derivation from on-chain data, or execution of remotely fetched code.\n",
"id": "MAL-2026-13604",
"modified": "2026-08-07T12:29:45Z",
"published": "2026-08-07T12:29:45Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/tailwindcss-motion-advanced/v/1.0.1"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in tailwindcss-motion-advanced (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.