MAL-2026-16350

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnppf-flag-icons/MAL-2026-16350.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16350
Published
2026-09-21T16:41:57Z
Modified
2026-09-21T17:30:05Z
Summary
Malicious code in bnppf-flag-icons (npm)
Details

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

Source: amazon-inspector (689227d0fdfe4abc108c7dfc5b5b97e752182a410265c141ca33161247619e78)

The package ships poc.js and wires it to both preinstall and postinstall lifecycle hooks in package.json, so it runs automatically on npm install. poc.js requires os and https, reads os.hostname() and os.userInfo().username, and sends them via HTTPS GET to a hardcoded webhook.site collector at https://webhook.site/f3d7a882-435a-4959-a4e9-18a3886f3447. The package name suggests a flag-icons library but the shipped code performs only host identifier exfiltration to an anonymous third-party collector; the version 99.99.99 is consistent with a dependency-confusion attempt. Installing the package causes the installer's hostname and OS username to be transmitted to an attacker-controlled endpoint.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020261",
            "import_time":  "2026-09-21T17:14:24.386258555Z",
            "modified_time":  "2026-09-21T16:41:57Z",
            "sha256":  "689227d0fdfe4abc108c7dfc5b5b97e752182a410265c141ca33161247619e78",
            "source":  "amazon-inspector",
            "versions":  [
                "99.99.99"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnppf-flag-icons

Package

Name
bnppf-flag-icons
View open source insights on deps.dev
Purl
pkg:npm/bnppf-flag-icons

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":  "poc.js",
            "sha256":  "570b63608fcd4534d17f7df694418c1ec7acca0bd67337ce2bbc64152d7f2703",
            "tlsh":  "92f0a3f077b09f301d2cc4d053c6648ae263f21238677bd2595d62950f555b02de76b9"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "bnppf-flag-icons-99.99.99.tgz",
            "hashes":  {
                "sha1":  "2314dd80f36fc561f504b05b491e367f7a927555",
                "sha512_sri":  "sha512-PIzrIEVkxK16NC7bC/kNsxjVSEeXfIWMcc0Dmp73cNe2bGKz3sMaLkvsNGPNvCzK8MxKdWDxLeWlMBz5klXzgg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnppf-flag-icons/MAL-2026-16350.json"