MAL-2026-16243

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/idx_form_script/MAL-2026-16243.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16243
Published
2026-09-16T16:13:49Z
Modified
2026-09-17T14:30:05Z
Summary
Malicious code in idx_form_script (npm)
Details

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

Source: amazon-inspector (3cc222b7d4398590749d82ffc06100ca629c6e07970a0f95bcf63889fda19cd3)

idx_form_script@999.0.2 is published with an implausibly high version number characteristic of dependency-confusion attacks against private internal package names. package.json declares a postinstall hook that runs callback.js, which auto-executes on npm install. callback.js requires os, https, http, and child_process, then calls collectSystemInfo() to gather os.userInfo, os.hostname, uid/gid, homedir, platform, cwd, local IP, and external IP (via https.get to api.ipify.org). It reads CI/CD credential environment variables including AWS_ACCESS_KEY_ID, GITHUB_TOKEN, NPM_TOKEN, DOCKER_PASSWORD, GITHUB_REPOSITORY, and GITHUB_ACTOR, and includes their values or presence flags in a JSON payload. The payload is POSTed to a hardcoded Discord webhook at discord.com/api/webhooks/1549797176794943579/..., with an additional DNS-based exfil channel. The package's self-labeling as an 'authorized PoC' is author-controlled cover-story text and does not change the observed behavior: any organization that resolves this name from the public registry will run installer-side reconnaissance and ship credential-context data to an attacker-controlled endpoint.

Source: ossf-package-analysis (59d074c4d6bd941d9586764043d556a83d301711c58eb661d57d63fa06ebec60)

The OpenSSF Package Analysis project identified 'idx_form_script' @ 999.0.4 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.
Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-09-16T21:38:33.853489979Z",
            "modified_time": "2026-09-16T16:13:49Z",
            "sha256": "59d074c4d6bd941d9586764043d556a83d301711c58eb661d57d63fa06ebec60",
            "source": "ossf-package-analysis",
            "versions": [
                "999.0.4"
            ]
        },
        {
            "id": "IN-MAL-2026-020121",
            "import_time": "2026-09-17T14:20:23.201857937Z",
            "modified_time": "2026-09-17T14:16:53Z",
            "sha256": "3cc222b7d4398590749d82ffc06100ca629c6e07970a0f95bcf63889fda19cd3",
            "source": "amazon-inspector",
            "versions": [
                "999.0.2"
            ]
        },
        {
            "id": "IN-MAL-2026-020113",
            "import_time": "2026-09-17T14:20:22.82614053Z",
            "modified_time": "2026-09-17T14:10:57Z",
            "sha256": "bb0ddc6e4f1d03b67fad8796ca1446a3c0e90cb9cf09fab732f39d263638c54a",
            "source": "amazon-inspector",
            "versions": [
                "999.0.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / idx_form_script

Package

Name
idx_form_script
View open source insights on deps.dev
Purl
pkg:npm/idx_form_script

Affected ranges

Affected versions

999.*
999.0.2
999.0.4

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": "callback.js",
            "sha256": "354888ccdd6aa9c7e98955896c6d39d8a52f0bb89331ccaa6ff83ee8b3aa98d4",
            "tlsh": "ea12d9a566b1161005e347902a1fa416327af1572756deb0fbdc43182fc0b7c93f2eba"
        },
        {
            "path": "package.json",
            "sha256": "6da76425956f8b74ce599595b10acba714e5fc143759f597297fabdc8c341be8",
            "tlsh": "cae0c2145e225a232ac02746186aa14266209f2b04047c095bcf582c82deab348fa31d"
        }
    ],
    "package_integrity": [
        {
            "filename": "idx_form_script-999.0.2.tgz",
            "hashes": {
                "sha1": "2cc5fd747174b924bc553eb9672fbd403d19cdbc",
                "sha512_sri": "sha512-KQnoAwqFuAXnbRoFGHhTW/w5DhiBLKCq8PIpLnvyD2JuvmhTzGlsvT3wK7d+QwcImdkCJcFrCPSOANEtyH/nNQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/idx_form_script/MAL-2026-16243.json"