MAL-2026-11106

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/date-sanitize-helper/MAL-2026-11106.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-11106
Published
2026-07-28T07:15:55Z
Modified
2026-07-28T14:36:54Z
Summary
Malicious code in date-sanitize-helper (npm)
Details

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

Source: amazon-inspector (33b6764b7711cfa03cf6b3a2f70e24b3256a61ac9319d45200ada236fe7c3ed2)

The package is advertised as a date parsing/sanitization helper but its postinstall.js runs automatically on npm install and performs installer-side data collection unrelated to the stated purpose. The script shells out via child_process/exec and curl to gather hostname, current user, id output, sudo -l output, uname, cwd, container indicators, GitHub Actions environment, running process list, and network information. It filters environment variables against a credential keyword set (KEY, TOKEN, SECRET, CREDENTIAL, KUBE, JENKINS, NPM, GEM, CARGO, AZURE, GCP, AWS_, GH_TOKEN, GITHUB_TOKEN) and probes cloud instance-metadata endpoints (AWS 169.254.169.254, Tencent, Aliyun). The aggregated output is base64-encoded and posted via curl to the hardcoded host pzs5w7ntzhsnepwk564lyfdci3oucl0a.oastify.com (a Burp Collaborator subdomain). Postinstall.js contains Chinese-language comments describing a 'compact exfil version', and index.js is an unrelated small color utility, indicating deliberate cover-story metadata.

Source: ossf-package-analysis (0ad5bc011fffec78eedbae93d69fa652c21868e6a8492f3c4a34cdb08dffd6e1)

The OpenSSF Package Analysis project identified 'date-sanitize-helper' @ 1.0.0 (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": "2026-07-28T07:26:58.291962473Z",
            "modified_time": "2026-07-28T07:15:55Z",
            "sha256": "0ad5bc011fffec78eedbae93d69fa652c21868e6a8492f3c4a34cdb08dffd6e1",
            "source": "ossf-package-analysis",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-010880",
            "import_time": "2026-07-28T14:19:57.208612991Z",
            "modified_time": "2026-07-28T13:30:58Z",
            "sha256": "33b6764b7711cfa03cf6b3a2f70e24b3256a61ac9319d45200ada236fe7c3ed2",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / date-sanitize-helper

Package

Name
date-sanitize-helper
View open source insights on deps.dev
Purl
pkg:npm/date-sanitize-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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "postinstall.js",
            "sha256": "2f12974f8ceb206a773b9456efee5274e5bc739dc9d7436fdc7f0893ce61af82",
            "tlsh": "834189e8f619b834364dc4f8b68e55027893e9af89f4ff74553b4db0044c98820aab36"
        },
        {
            "path": "package.json",
            "sha256": "afa92662e6b9bb97786baa6af2d01cdbdc94523daa7a8f4cd460d28459b3f60a",
            "tlsh": "24e02b2088115b3368c4a7b55d53634bbe320e1f12807c1917a77594c38f6ba45bf72e"
        }
    ],
    "package_integrity": [
        {
            "filename": "date-sanitize-helper-1.0.0.tgz",
            "hashes": {
                "sha1": "58ebecddd40bb2b4109312cd3f9b95a2e8ac6e7e",
                "sha512_sri": "sha512-gmHN2bgD023WXMtDFFkZMbWmCAVtWolqjQLVGvga/y+n6XDY9leUq3jnWFyvO6qyMO2snwCrIzCMmmJSpfEujw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/date-sanitize-helper/MAL-2026-11106.json"