MAL-2026-12818

Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/beaver-ui-multi-select-with-all/MAL-2026-12818.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-12818

Aliases

GHSA-8f6w-27v9-924g

Published

2026-08-05T15:05:01Z

Modified

2026-08-06T01:20:08.385861636Z

Summary

Malicious code in beaver-ui-multi-select-with-all (npm)

Details

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

Source: amazon-inspector (bbb4bab7b1c75e94cd3411aa312a1313e3d5a84bed77943b10f8c969b751cb23)

On require() of the package's main entry, index.js loads loader.js which selects a per-platform URL, downloads an opaque native binary from one of three Cloudflare Workers subdomains (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS-TXT chunked-base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The bytes are written to /tmp/.cache<rand> or %TEMP%\dotnetdiag<rand>.exe, chmod 0755, and spawned detached via /bin/sh -c or cmd /c start /b. Hostnames are assembled from split string arrays (e.g. ["oob-worker.cf99-9b3.wor","kers.","dev"].join("")) to evade substring scans, and file names (analyticsstate, dotnetdiag) masquerade as diagnostics artifacts. A telemetry-styled opt-out gate (DISABLETELEMETRY / ANALYTICSOPTOUT / DONOT_TRACK) frames the download-and-execute as consented telemetry, but the default path is unconditional remote code execution. No hash or signature verification is performed; the URL is mutable and anonymous. The package name resembles a UI select component but its only observable behavior on import is the dropper.

Source: ghsa-malware (9c3519c1c22bb4eab75836d741089a70981c2909eea8323132d4424fb338f929)

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": [
        {
            "versions": [
                "35.6.4"
            ],
            "import_time": "2026-08-05T15:19:58.03448561Z",
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T15:05:01Z",
            "id": "IN-MAL-2026-015561",
            "sha256": "bbb4bab7b1c75e94cd3411aa312a1313e3d5a84bed77943b10f8c969b751cb23"
        },
        {
            "import_time": "2026-08-06T00:58:53.323615302Z",
            "source": "ghsa-malware",
            "id": "GHSA-8f6w-27v9-924g",
            "modified_time": "2026-08-05T17:55:56Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "sha256": "9c3519c1c22bb4eab75836d741089a70981c2909eea8323132d4424fb338f929"
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - inspector-research@amazon.com

Affected packages

npm / beaver-ui-multi-select-with-all

Package

Name: beaver-ui-multi-select-with-all; View open source insights on deps.dev
Purl: pkg:npm/beaver-ui-multi-select-with-all

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

35.*

35.6.4

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/beaver-ui-multi-select-with-all/MAL-2026-12818.json"

indicators

{
    "evidence_files": [
        {
            "tlsh": "c4a1866a07a6701887b0dbe4c7175415f65ae6637780c194fb9ca9981ff322483b2efc",
            "path": "_loader.js",
            "sha256": "fa5cdf75f6c592a7cbb13f7a13935eb8bee440f5d616295f0cf3e69ba0fe2473"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-9b0fIxcrxb1+v46zohypDGetz22mE/PqOB4b/afboDGMOOc+6My+6412qP5cyVW6nvvpNlgVQXlq7yR8d/eqlw==",
                "sha1": "33aba35b2fedf13b7ec007e99d61427fa2fd7eac"
            },
            "filename": "beaver-ui-multi-select-with-all-35.6.4.tgz"
        }
    ]
}

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"
    }
]