MAL-2026-13821

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mnchfnvbue1/MAL-2026-13821.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13821
Aliases
  • GHSA-mvqj-h65j-wcmq
Published
2026-08-12T10:29:52Z
Modified
2026-08-12T13:00:23.467212972Z
Summary
Malicious code in mnchfnvbue1 (npm)
Details

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

Source: amazon-inspector (ff948b6e989a38a47cbb12d4e633d48a2069c04bb64066d66140f3b27835ef86)

The tarball contains a single file, index.html, declared as the package main. The HTML contains heavily obfuscated JavaScript that mimics a Cloudflare 'Just a moment...' interstitial and, after a 1-second timeout, decodes a string-array to build a URL and calls window.location.replace to navigate a browser to that URL. There are no npm lifecycle scripts (preinstall/install/postinstall/prepare), no bin entry, and main points at a non-JavaScript file, so npm install and require() do not execute this code on an installer's machine. The redirect only fires in a browser rendering the HTML. The package appears to be registry abuse (using npm to host an obfuscated browser redirect asset) rather than a supply-chain attack against installers.

Source: ghsa-malware (708d02de3165aa040348bd14837e8b2009f5a38bfdea57251d4cd9f5d599b6ec)

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": [
        {
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "id": "GHSA-mvqj-h65j-wcmq",
            "import_time": "2026-08-12T10:39:02.420062317Z",
            "sha256": "708d02de3165aa040348bd14837e8b2009f5a38bfdea57251d4cd9f5d599b6ec",
            "modified_time": "2026-08-12T10:29:53Z",
            "source": "ghsa-malware"
        },
        {
            "id": "IN-MAL-2026-017529",
            "import_time": "2026-08-12T12:51:48.177067239Z",
            "sha256": "ff948b6e989a38a47cbb12d4e633d48a2069c04bb64066d66140f3b27835ef86",
            "versions": [
                "1.0.0"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-12T12:34:24Z"
        }
    ]
}
References
Credits

Affected packages

npm / mnchfnvbue1

Package

Name
mnchfnvbue1
View open source insights on deps.dev
Purl
pkg:npm/mnchfnvbue1

Affected ranges

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

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "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",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "index.html",
            "tlsh": "59c274616381746119039be9372e72dbe2284c6f73780c8bf66c6d91ef59d08cee1a31",
            "sha256": "5117ac58176e34a31157f12396ae9ed0f6a1a2acd8fa710dba6889b55b6964a7"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mnchfnvbue1/MAL-2026-13821.json"