MAL-2026-14286

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@wizloft/harness-context/MAL-2026-14286.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14286
Published
2026-08-19T08:33:13Z
Modified
2026-08-19T09:00:19Z
Summary
Malicious code in @wizloft/harness-context (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (b0315deb3fb6b42e929a55eafaeaedbf1b428ee8873d4ae31f5ec9956f21b554)

dist/index.js (the package's declared main) contains a heavily obfuscated obfuscator.io-style IIFE appended after the legitimate context-service code. On import, the payload stashes global.r = require and global.m = module, then issues HTTPS requests to an Ethereum public RPC endpoint (h.drpc.org) and a block-explorer account API to read state from contract 0xa322E5f3..., using that state to resolve a next-stage URL that is fetched and executed in-process. The obfuscated string array (~303 entries via a rotated decoder) hides drpc.org, ?module=ac, POST, application/json, Mozilla/5., and the contract address. This is the EtherHiding loader pattern: attacker-controlled contract state serves as a mutable pointer to arbitrary code executed in the installer/consumer process at require time. Behavior does not match the package's advertised purpose of a small typed capability contract.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-018408",
            "import_time": "2026-08-19T08:48:53.666015613Z",
            "modified_time": "2026-08-19T08:33:13Z",
            "sha256": "b0315deb3fb6b42e929a55eafaeaedbf1b428ee8873d4ae31f5ec9956f21b554",
            "source": "amazon-inspector",
            "versions": [
                "0.1.1-alpha.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @wizloft/harness-context

Package

Name
@wizloft/harness-context
View open source insights on deps.dev
Purl
pkg:npm/%40wizloft/harness-context

Affected ranges

Affected versions

0.*
0.1.1-alpha.3

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": "dist/index.js",
            "sha256": "d414e0737a498fe710e7ffb224de0ed14cf847bfc42b18529ca10d4e118882b9",
            "tlsh": "64f294c4bbd0a44003076abb7b1bf4e5e56a08adb4844ac6f11cfe84fb96326d5f2531"
        }
    ],
    "package_integrity": [
        {
            "filename": "harness-context-0.1.1-alpha.3.tgz",
            "hashes": {
                "sha1": "621a5786ea5e82611571caaebbbc0c45233746a7",
                "sha512_sri": "sha512-QuJ0Zc/EozGNeGCAhDuryXKfykj8OtD6FrDttkKJiadHdjcl1uGKBXDFSVlpnEdLV+ZoIS8gm9N7buLA28FwGg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@wizloft/harness-context/MAL-2026-14286.json"