MAL-2026-16285

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/test899-auth/MAL-2026-16285.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16285
Aliases
  • GHSA-jf2q-w77c-99vv
Published
2026-09-18T15:26:05Z
Modified
2026-09-18T20:45:06Z
Summary
Malicious code in test899-auth (npm)
Details

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

Source: amazon-inspector (64702ec2b2b0fcc5ec6eb56e8ca63fc94d3ff54fdcd45509fcc9640ccbbffdcf)

On npm install, the package's preinstall hook executes index.js which collects installer host and identity information (hostname, platform, OS release, whoami, id, current working directory, uname -a), base64-encodes the blob, splits it into DNS labels, and issues nslookup queries against the hardcoded subdomain hufw8vt7sk2vw016qzzgek9gr7x0ls9h.oastify.com. This tunnels installer identity and host details out-of-band via DNS to a Burp Collaborator endpoint, bypassing HTTP egress filtering. The package.json also declares a self-referential unpinned dependency on test899-auth: ^1.0.1, consistent with a probing/PoC harness shape. The name and behavior are consistent with a research or malicious probe package rather than a functional authentication library.

Source: ghsa-malware (91a9e931a96bd4a5c20ffe47187dd851fed79813d869f3c05afeaafedf721716)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Source: ossf-package-analysis (f3dbbfadfd695e5a3655ca1f42ea8a261f0807987dfed7d994b40f27b32ace9d)

The OpenSSF Package Analysis project identified 'test899-auth' @ 1.0.1 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.

  • The package executes one or more commands associated with malicious behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-09-18T15:39:11.675545126Z",
            "modified_time": "2026-09-18T15:26:05Z",
            "sha256": "f3dbbfadfd695e5a3655ca1f42ea8a261f0807987dfed7d994b40f27b32ace9d",
            "source": "ossf-package-analysis",
            "versions": [
                "1.0.1"
            ]
        },
        {
            "id": "GHSA-jf2q-w77c-99vv",
            "import_time": "2026-09-18T16:27:50.120777475Z",
            "modified_time": "2026-09-18T16:01:56Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "91a9e931a96bd4a5c20ffe47187dd851fed79813d869f3c05afeaafedf721716",
            "source": "ghsa-malware"
        },
        {
            "id": "IN-MAL-2026-020183",
            "import_time": "2026-09-18T20:38:13.411172252Z",
            "modified_time": "2026-09-18T20:24:24Z",
            "sha256": "64702ec2b2b0fcc5ec6eb56e8ca63fc94d3ff54fdcd45509fcc9640ccbbffdcf",
            "source": "amazon-inspector",
            "versions": [
                "1.0.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / test899-auth

Package

Name
test899-auth
View open source insights on deps.dev
Purl
pkg:npm/test899-auth

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
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.js",
            "sha256": "2c918dce45e4523ca2710acc13cf9eb28b06cb8ff68860524477509182aabc9e",
            "tlsh": "a441014539f82a7001a3ec96186311472336e3633c64f4f9b9ad97410f0a8ac93aa7e9"
        },
        {
            "path": "package.json",
            "sha256": "cb71cfa6a0cbe6b808441931257597e621e5c436d2a3a62cf2a81c6de067d5ba",
            "tlsh": "5dc08c208c22dd3361c826e20039400276a18ce600086c0d23c30004c2ce97710ae228"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/test899-auth/MAL-2026-16285.json"