MAL-2026-4639

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/pg-expense-example/MAL-2026-4639.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4639
Published
2026-05-22T19:52:30Z
Modified
2026-05-26T06:02:49.140669911Z
Summary
Malicious code in pg-expense-example (npm)
Details

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

Source: amazon-inspector (d1d939ad3f0e8e9754bf3562f06692713a76d5c0f18ac13c956f9cb199ed0fbf)

On require/load, index.js unconditionally collects host identifiers (hostname, username, platform, arch, cwd, pid) and sends them as URL query parameters via HTTPS GET to a hardcoded Burp Collaborator-style domain vwfmeddcdgidvdwpkigkg0l8us5vf3wtx.oast.fun. The package ships no advertised functionality — its only behavior on load is the beacon. package.json has empty author/description fields and declares an unused chalk dependency. A code comment in Azerbaijani (sənin domenin = 'your domain') is consistent with an attacker-controlled callback host, indicating PoC/reconnaissance malware rather than legitimate software.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-004250",
            "import_time": "2026-05-26T05:52:14.213435018Z",
            "sha256": "d1d939ad3f0e8e9754bf3562f06692713a76d5c0f18ac13c956f9cb199ed0fbf",
            "modified_time": "2026-05-22T19:52:30Z",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / pg-expense-example

Package

Name
pg-expense-example
View open source insights on deps.dev
Purl
pkg:npm/pg-expense-example

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "index.js",
            "tlsh": "ca11eff5aaf385a01ebb21c05586580690afd5037d0df8fc7e9d43e00f854b545a1ab5",
            "sha256": "b05da6ffb4b4d0de6b9ab5b2015f824eb727babe0be418b7191c42b8174d77ff"
        },
        {
            "path": "package.json",
            "tlsh": "20e0c22859a2993305c612510d2d9053b261de1f0048bc0c63cb992c86de5b328fe75e",
            "sha256": "96b2f35f8d04b83fc37ef142a6abd97123d03d94191c026457c8c85f4656a2cb"
        }
    ],
    "package_integrity": [
        {
            "filename": "pg-expense-example-1.0.0.tgz",
            "hashes": {
                "sha1": "f761064e0df6acf54fa877225239ff9adf5ce743",
                "sha512_sri": "sha512-EK9Gl6R2zlVSPYxkexRYq9pxic444clddv4/pL1veSi2SmGTgMo2K0m40hz1Hf6B7ZTKkymE2AN0+Rt6xdikUw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/pg-expense-example/MAL-2026-4639.json"