MAL-2026-16365

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/my-ctf-helper-script-9921/MAL-2026-16365.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16365
Aliases
  • GHSA-7mhc-78r2-fgw8
Published
2026-09-21T19:48:21Z
Modified
2026-10-01T04:45:52Z
Summary
Malicious code in my-ctf-helper-script-9921 (npm)
Details

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

Source: amazon-inspector (41ee1dafe6dce8750ac695c9d13e13c2808e2f35d94bbbcc41a4444a02541409)

On require/import, the package's main module executes a top-level fetch to the hardcoded collector URL https://webhook.site/99e9df7b-fe86-4c60-822a-5352b1f9edf0/, appending document.cookie as a query-string parameter. The package has no other advertised functionality; the sole effect of loading it is to send the ambient cookie value to a third-party webhook capture endpoint controlled by whoever provisioned that webhook.site token. webhook.site is a generic ad-hoc data-collection service, unrelated to any legitimate publisher infrastructure.

Source: ghsa-malware (539e9def7d4d421fa2797a7c169799095f619a7408339e1c0c390b97a4f088f5)

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-2026-020273",
            "import_time":  "2026-09-21T20:17:15.530688412Z",
            "modified_time":  "2026-09-21T19:48:21Z",
            "sha256":  "41ee1dafe6dce8750ac695c9d13e13c2808e2f35d94bbbcc41a4444a02541409",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "id":  "GHSA-7mhc-78r2-fgw8",
            "import_time":  "2026-10-01T04:32:29.791007671Z",
            "modified_time":  "2026-10-01T03:46:45Z",
            "ranges":  [
                {
                    "events":  [
                        {
                            "introduced":  "0"
                        }
                    ],
                    "type":  "SEMVER"
                }
            ],
            "sha256":  "539e9def7d4d421fa2797a7c169799095f619a7408339e1c0c390b97a4f088f5",
            "source":  "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / my-ctf-helper-script-9921

Package

Name
my-ctf-helper-script-9921
View open source insights on deps.dev
Purl
pkg:npm/my-ctf-helper-script-9921

Affected ranges

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

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":  "index.js",
            "sha256":  "969a8ea8d6504dfc91c3cbdd09fc3a086589d30f33c7167610c84062c8d509b1",
            "tlsh":  "06b012ba3506d838195dc0545329ba0ced9573068c87b54acb35abf40fd11138e841f6"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "my-ctf-helper-script-9921-1.0.0.tgz",
            "hashes":  {
                "sha1":  "43105e5076382a1fe90fe13cd9cb24d0b670988a",
                "sha512_sri":  "sha512-7YpIBzgVkVsH82YB8DBILno3dc7hV9B3vM8al3qoN6SMPoIJ0TFQ/J22xBd5nT33lyic62nibwmOYNP7vLqj4g=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/my-ctf-helper-script-9921/MAL-2026-16365.json"