MAL-2026-12814

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/umber-root/MAL-2026-12814.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12814
Published
2026-08-05T13:15:05Z
Modified
2026-08-05T14:37:28.598262616Z
Summary
Malicious code in umber-root (npm)
Details

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

Source: amazon-inspector (a16b80d2c76699beaf0773da7233c1e136a951a8edd0ba84b073ea78590c23e1)

The npm postinstall lifecycle hook runs dist/config.js, which fetches JSON from https://my-api.trade-api.workers.dev?id=3 and then invokes globalThis[data.success](data.id), letting the remote endpoint choose which global (eval, Function, require, etc.) to call and with what argument. The package reassigns globalThis.require = require earlier in the same file to make require reachable through this indirection. The result is arbitrary code execution on every installer machine during npm install, with both the executor and its argument supplied by an attacker-controlled Cloudflare Workers endpoint. The package advertises itself as a color toolkit; there is no build or configuration purpose served by a network-dispatched global invocation, and the string-indexed global lookup is an evasion pattern that hides the sink from static scanners.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "1.1.0"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-014943",
            "sha256": "a16b80d2c76699beaf0773da7233c1e136a951a8edd0ba84b073ea78590c23e1",
            "import_time": "2026-08-05T14:19:45.287063814Z",
            "modified_time": "2026-08-05T13:15:05Z"
        },
        {
            "versions": [
                "1.1.2"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-014945",
            "sha256": "a47da1a0e6cc80e91ba29f2baff3c412926050d2f5cff1441102734b96592769",
            "import_time": "2026-08-05T14:19:45.50513503Z",
            "modified_time": "2026-08-05T13:15:23Z"
        }
    ]
}
References
Credits

Affected packages

npm / umber-root

Package

Name
umber-root
View open source insights on deps.dev
Purl
pkg:npm/umber-root

Affected ranges

Affected versions

1.*
1.1.0
1.1.2

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "umber-root-1.1.0.tgz",
            "hashes": {
                "sha512_sri": "sha512-8Rsj6uFxJGKalCnrdhk3Pqc2DtUJweekrpz3FobPlavqRj85AwB7eALGuLyjTizlxRiFA6zoK5S0EDmsbNG2dg==",
                "sha1": "e76577421aa382e0a05e04d9a4e2455003341496"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "00d0977bc2cda028681070dde0090624b583e562cb3ec82bfa2deee2dce5964ea41134",
            "sha256": "845eb298bf47e23bab8dd59f0182977c16a384dbd2feb79327816ee66becef6d",
            "path": "dist/config.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/umber-root/MAL-2026-12814.json"
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"
    }
]