MAL-2026-13146

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-codemods/MAL-2026-13146.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13146
Published
2026-08-05T15:16:54Z
Modified
2026-08-05T15:52:45.056593650Z
Summary
Malicious code in dolyame-ui-codemods (npm)
Details

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

Source: amazon-inspector (aa4592f76ef0995b4e3c8b0cc15c00862cf594cbaebbfcd2bf25d2640bbf6012)

On require('dolyame-ui-codemods'), index.js loads polyfill.js, which reconstructs remote hostnames from split string-fragment arrays joined at runtime (assembling oob-worker.*.workers.dev subdomains and sdk/ext/pkg/net.dl.wel1.ru), selects a platform-specific endpoint, downloads a binary over HTTPS, writes it to /var/tmp or %TEMP% under a disguised name resembling dotnetdiag, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. A DNS-TXT-record fallback channel retrieves chunked base64 payloads from numbered subdomains of dl.wel1.ru when HTTPS delivery fails. A cooldown stamp file suppresses repeat execution and environment-variable checks gate execution to evade sandboxes. The package is advertised as a UI toolkit and has no legitimate need for a platform-native binary, obfuscated hostname assembly, or a DNS covert channel. Installing or importing this package causes remote code execution on the host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "aa4592f76ef0995b4e3c8b0cc15c00862cf594cbaebbfcd2bf25d2640bbf6012",
            "modified_time": "2026-08-05T15:16:54Z",
            "import_time": "2026-08-05T15:20:01.138672519Z",
            "versions": [
                "35.2.6"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015636"
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-ui-codemods

Package

Name
dolyame-ui-codemods
View open source insights on deps.dev
Purl
pkg:npm/dolyame-ui-codemods

Affected ranges

Affected versions

35.*
35.2.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "dolyame-ui-codemods-35.2.6.tgz",
            "hashes": {
                "sha512_sri": "sha512-uzgf/Sy2MFCszLvyOjj7Lx1AqhNUO5sbFaC6bgt22z71pxUCjHoiCQGVkp8R9XdMeS20r9GiPqlZL3ZZTG5OTQ==",
                "sha1": "f0a473a43096fb542576a8ef6b73d1e8b5defaa1"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_polyfill.js",
            "tlsh": "32a1b75a166a710887b09be0c7174416f55ff2633381c295fb5ca5981fb612483b2efc",
            "sha256": "711d749650d6b347a73d2ad914855bc8104bfbc1d81fcb3f7fdd444d8a83bd61"
        }
    ]
}
cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-codemods/MAL-2026-13146.json"