MAL-2026-16364

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bytepack-probe-a7x3/MAL-2026-16364.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16364
Published
2026-09-21T19:51:34Z
Modified
2026-09-21T20:30:13Z
Summary
Malicious code in bytepack-probe-a7x3 (npm)
Details

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

Source: amazon-inspector (1f158536e9d84e6cee18e2a3ce84869e34f1564ec18a1313a9e8c03b304e3d70)

package.json declares a dependency leak-internal whose source is the HTTPS tarball URL https://src-ssrf.bytedance.net/ssrf/probe.tgz rather than a registry version range. On npm install, npm fetches and installs whatever bytes that URL currently returns, executing any lifecycle scripts contained in the fetched tarball. There is no version pin, no integrity hash, and no signature check, so the code executed on the installer's machine is whatever the operator of that host serves at the moment of install. The hostname suggests an SSRF-probe artifact hosted on an internal-looking domain, and the dependency name leak-internal together with the path segment ssrf/probe.tgz indicates the fetched payload is intended to run probing behavior inside the installer's network.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020275",
            "import_time":  "2026-09-21T20:17:15.608358975Z",
            "modified_time":  "2026-09-21T19:51:34Z",
            "sha256":  "1f158536e9d84e6cee18e2a3ce84869e34f1564ec18a1313a9e8c03b304e3d70",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-020276",
            "import_time":  "2026-09-21T20:17:15.645420764Z",
            "modified_time":  "2026-09-21T19:51:43Z",
            "sha256":  "68a86424e95be011ab100ba078387e7b3ba51169d6027bce287d1f5527a6c437",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bytepack-probe-a7x3

Package

Name
bytepack-probe-a7x3
View open source insights on deps.dev
Purl
pkg:npm/bytepack-probe-a7x3

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":  "package.json",
            "sha256":  "b49e1d6fa52faa1bbf085825565dde6df4b3ac8dedbbd1f90e4300ef81c0a60c",
            "tlsh":  "cae07d20d6141c3334dc04f429f20147bd73cc3f40aab9086387522885ce56735f830c"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "bytepack-probe-a7x3-1.0.0.tgz",
            "hashes":  {
                "sha1":  "843c6abc35dc90ce1697fdbb21276ad19cd73d3d",
                "sha512_sri":  "sha512-hCER5zYht/CVBROJpMQHf0UXjdbCR0ZaWKiVgulHtRwgFTyQUUmrT5D5jarzyCZN8GgmPkAkzKM8T1p47TRABA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bytepack-probe-a7x3/MAL-2026-16364.json"