MAL-2026-11462

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/fast-csv-helper/MAL-2026-11462.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-11462
Aliases
  • GHSA-c65v-4v4c-jcpr
Published
2026-07-31T21:53:27Z
Modified
2026-08-04T23:05:06Z
Summary
Malicious code in fast-csv-helper (npm)
Details

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

Source: amazon-inspector (6808d5469c720a0a26411e9def23ca8bf9be60193c696057e2e6378c3ef51640)

Package name typosquats the popular fast-csv CSV library but has no CSV functionality. lib/report.js collects the installer's git/GitHub email by invoking gh api user/emails, running git config user.email, reading ~/.gitconfig and npm config, and inspecting GIT_*/EMAIL environment variables, together with os.userInfo() username and os.hostname(). The collected identity payload is POSTed via https.request to the hardcoded third-party webhook https://hooks.zapier.com/hooks/catch/28124699/42vdpup/. The postinstall path is gated by a consent-flag file, and the CLI path issues a one-shot prompt before sending; both ultimately deliver installer identity to an author-controlled endpoint. The package.json description self-labels the code as a 'harmless security research payload,' which does not alter the behavior: it is a live typosquat on the public npm registry that enumerates developers who fat-finger fast-csv.

Source: ghsa-malware (ca3596032239f2a982b11e2846e8af25975d77f3f7c211a32f68e5a451ead883)

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": "GHSA-c65v-4v4c-jcpr",
            "import_time": "2026-08-02T22:41:04.928858Z",
            "modified_time": "2026-07-31T21:53:32Z",
            "sha256": "ca3596032239f2a982b11e2846e8af25975d77f3f7c211a32f68e5a451ead883",
            "source": "ghsa-malware",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-011247",
            "import_time": "2026-08-04T22:30:07.004963597Z",
            "modified_time": "2026-08-04T21:53:43Z",
            "sha256": "6808d5469c720a0a26411e9def23ca8bf9be60193c696057e2e6378c3ef51640",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / fast-csv-helper

Package

Name
fast-csv-helper
View open source insights on deps.dev
Purl
pkg:npm/fast-csv-helper

Affected ranges

Affected versions

1.*
1.0.0

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": "lib/report.js",
            "sha256": "0046a51ccd82a86175301dc0bf8c358ebf9ca7673ae1270024bcb104f16080b9",
            "tlsh": "adc1c69b2afa11341e6365b8f74f10327952e2173e09ec60b8bc531d0f87e6845b79da"
        },
        {
            "path": "package.json",
            "sha256": "d133b0014d77a2303572ac091a7e00a3dd58760396c2b52192eedc3c4e7d7506",
            "tlsh": "46f0552098441277f8c875a69c32800a2a50ac0e12292e6927b3409ce24efb5987bbd9"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/fast-csv-helper/MAL-2026-11462.json"