MAL-2026-15812

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eslint-rxjs/MAL-2026-15812.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15812
Published
2026-09-02T02:11:28Z
Modified
2026-09-04T07:00:08Z
Summary
Malicious code in eslint-rxjs (npm)
Details

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

Source: amazon-inspector (2794273ee7e40da4b37c017636209acf1402b1104ab5fc265a43cc7d83228e72)

eslint-rxjs is a masquerade package whose npm metadata is internally inconsistent: the name references ESLint/RxJS, the description reads 'Integrate redis with cookies', and the author field impersonates well-known maintainers. The package ships no advertised functionality; index.cjs contains only a beacon helper. The package.json postinstall hook runs scripts/postinstall.cjs, which loads index.cjs and calls onInstall(), unconditionally issuing an HTTP GET to the hardcoded ngrok tunnel https://e493-95-216-46-122.ngrok-free.app/ping at install time. An ngrok-free.app subdomain is ephemeral, attacker-controlled infrastructure with no legitimate use for a published package; the request confirms code execution on the installer's machine and discloses the installer's source IP and install timing to that endpoint. This is the reconnaissance stage of a supply-chain dropper.

Source: ossf-package-analysis (994311f4267205d33ceb2b43d3f7d72767d384dcc286b6962b5cea13489f7280)

The OpenSSF Package Analysis project identified 'eslint-rxjs' @ 1.0.1 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.
Database specific 
{
    "malicious-packages-origins":  [
        {
            "import_time":  "2026-09-02T02:44:29.209783706Z",
            "modified_time":  "2026-09-02T02:11:28Z",
            "sha256":  "994311f4267205d33ceb2b43d3f7d72767d384dcc286b6962b5cea13489f7280",
            "source":  "ossf-package-analysis",
            "versions":  [
                "1.0.1"
            ]
        },
        {
            "id":  "IN-MAL-2026-019375",
            "import_time":  "2026-09-04T00:45:54.138897525Z",
            "modified_time":  "2026-09-03T23:48:37Z",
            "sha256":  "61a30ebdfe8d6fb82fe934cf8bc0327f06a336aebc2c73627286451e46c4b59b",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.1"
            ]
        },
        {
            "id":  "IN-MAL-2026-019636",
            "import_time":  "2026-09-04T06:53:31.445132415Z",
            "modified_time":  "2026-09-04T06:37:03Z",
            "sha256":  "2794273ee7e40da4b37c017636209acf1402b1104ab5fc265a43cc7d83228e72",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / eslint-rxjs

Package

Name
eslint-rxjs
View open source insights on deps.dev
Purl
pkg:npm/eslint-rxjs

Affected ranges

Affected versions

1.*
1.0.0
1.0.1

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":  "index.cjs",
            "sha256":  "5d3e21578d1eefece343575bd3bd5f8bfbb88871e9e20f2618b8a826e66dca06",
            "tlsh":  "34e0d8991cbe22b58a71e3ba67171506ec92952b2fc0964673dcc5090f25a10c14ed0d"
        },
        {
            "path":  "package.json",
            "sha256":  "bee7d410a0f956fc962bfe1ace1339189b8e861e80112b87a344bd28de6b9ad9",
            "tlsh":  "e1f0d822ee148a2319f4866d48ac0102fb515b0f4034dc0f72ff2a1c07d227b589ab26"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "eslint-rxjs-1.0.1.tgz",
            "hashes":  {
                "sha1":  "1f655d43e85199068e99c16ae7e2e713afb35050",
                "sha512_sri":  "sha512-WWXIVFmeHQVDUIZwNSQahJtmsMsXe4nvsvGhGi9dJd/p16KQTxXYLlumPuBCRjsl6BqgsjXZNXOHXIgjo0eh4A=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eslint-rxjs/MAL-2026-15812.json"