MAL-2026-18187

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/simplewave/MAL-2026-18187.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18187
Published
2026-10-22T06:10:14Z
Modified
2026-10-22T06:45:05Z
Summary
Malicious code in simplewave (npm)
Details

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

Source: amazon-inspector (d984cf27dec602e96199a4361b485f0a7c79e2134977a355d42ddb46edd606d0)

simplewave@0.0.2 declares a postinstall script in package.json that runs an inline Node command performing an HTTP GET to a subdomain of oast.fun with the installer's os.hostname() embedded as the leftmost DNS label. oast.fun is the public Interactsh out-of-band interaction server, used to receive exfiltrated data via DNS/HTTP callbacks. The beacon fires unconditionally on npm install, with no caller consent or configuration. The shipped index.js is a trivial stub providing no advertised functionality, so the manifest-level beacon is the package's entire effect. The host identifier of every machine that installs the package is delivered to a third-party OOB collector controlled by whoever provisioned the oast.fun subdomain token.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021566",
            "import_time":  "2026-10-22T06:30:23.52812547Z",
            "modified_time":  "2026-10-22T06:10:14Z",
            "sha256":  "d984cf27dec602e96199a4361b485f0a7c79e2134977a355d42ddb46edd606d0",
            "source":  "amazon-inspector",
            "versions":  [
                "0.0.2"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / simplewave

Package

Name
simplewave
View open source insights on deps.dev
Purl
pkg:npm/simplewave

Affected ranges

Affected versions

0.*
0.0.2

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":  "package.json",
            "sha256":  "e8471246cd57d1305b12c3523851f05178e56bbd2d2ab43c181179308b66d643",
            "tlsh":  "4ce02df80f80db3b60c40ee406a78026f323c80200042a00e3fb11aa02d82f20c3e48c"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "simplewave-0.0.2.tgz",
            "hashes":  {
                "sha1":  "5a97802b03f92a9f0fb4dcce29e11adbd742c174",
                "sha512_sri":  "sha512-evpJRFgOF3WjrXTV1n+6Ad0pKHFnp+kE1BBZErY7voT58oBBhMEtpksG8wi1Doy9uIKzTT1bNcbcHoV+gHACoA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/simplewave/MAL-2026-18187.json"