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
Aliases
  • GHSA-34p9-xxp2-hv3g
Published
2026-09-21T16:41:57Z
Modified
2026-10-02T23:30:09Z
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.

Source: ghsa-malware (e0671ec4edd4de7b54d08681640fe67e830c3599cc0a0c6765f3139f9fb7e653)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

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"
            ]
        },
        {
            "id":  "GHSA-34p9-xxp2-hv3g",
            "import_time":  "2026-10-02T23:23:00.328596448Z",
            "modified_time":  "2026-10-02T22:34:11Z",
            "ranges":  [
                {
                    "events":  [
                        {
                            "introduced":  "0"
                        }
                    ],
                    "type":  "SEMVER"
                }
            ],
            "sha256":  "e0671ec4edd4de7b54d08681640fe67e830c3599cc0a0c6765f3139f9fb7e653",
            "source":  "ghsa-malware"
        }
    ]
}
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

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected

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"
    },
    {
        "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"