MAL-2026-15847

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/fieldbase-webapplication-buildtools/MAL-2026-15847.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15847
Published
2026-09-03T14:20:50Z
Modified
2026-09-04T01:00:04Z
Summary
Malicious code in fieldbase-webapplication-buildtools (npm)
Details

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

Source: amazon-inspector (8c30b72acbc526ba924e071ebefd3bc3a131d6dc29abaa71fa76deab2836345e)

package.json declares preinstall and install lifecycle scripts that collect the installer's username (whoami), hostname, current working directory, and npm package name, base64-encode them, and send them to the hardcoded endpoint https://eoy34oyrep9j5x8.m.pipedream.net via both an HTTPS GET path and a DNS-lookup channel (nslookup against a subdomain of the same host). This fires automatically on npm install with no user interaction. The version number 99.99.99 and package name pattern are consistent with a dependency-confusion lure targeting an internal package name.

Source: ossf-package-analysis (2429684480958b2faee9e5dc817ba4f9b5c9e00bd73052546dde0c033654e8ba)

The OpenSSF Package Analysis project identified 'fieldbase-webapplication-buildtools' @ 99.99.99 (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":  "2026-09-03T14:40:38.757400951Z",
            "modified_time":  "2026-09-03T14:20:50Z",
            "sha256":  "2429684480958b2faee9e5dc817ba4f9b5c9e00bd73052546dde0c033654e8ba",
            "source":  "ossf-package-analysis",
            "versions":  [
                "99.99.99"
            ]
        },
        {
            "id":  "IN-MAL-2026-019382",
            "import_time":  "2026-09-04T00:45:54.565556516Z",
            "modified_time":  "2026-09-03T23:49:41Z",
            "sha256":  "8c30b72acbc526ba924e071ebefd3bc3a131d6dc29abaa71fa76deab2836345e",
            "source":  "amazon-inspector",
            "versions":  [
                "99.99.99"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / fieldbase-webapplication-buildtools

Package

Name
fieldbase-webapplication-buildtools
View open source insights on deps.dev
Purl
pkg:npm/fieldbase-webapplication-buildtools

Affected ranges

Affected versions

99.*
99.99.99

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":  "e34fdf870b1eec16bc8e7ec4d9864252232c1af80bc19e6468748396cbb293ea",
            "tlsh":  "f611bd1e45348e63b0d78ef439006f6de5fa2b6f30797a8863098e1d541c22170eb24b"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "fieldbase-webapplication-buildtools-99.99.99.tgz",
            "hashes":  {
                "sha1":  "035b7b761c4a902b57bc8b34d6bd1e2044823b84",
                "sha512_sri":  "sha512-CYgK+b+E+UtXJpS73sLP8gjvJhInpfPF76zP/lyvL8NY3vlha0sxqXfje1oEirrKRw+5aGF/AQmYfr3GDoJdcQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/fieldbase-webapplication-buildtools/MAL-2026-15847.json"