MAL-2026-12051

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-ui-action/MAL-2026-12051.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12051
Aliases
  • GHSA-377x-9v5g-rvgw
Published
2026-08-05T01:21:03Z
Modified
2026-08-06T01:21:38Z
Summary
Malicious code in tinkoff-ui-action (npm)
Details

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

Source: amazon-inspector (c00c178eed539f0535846617d7201e635f073f5f6477d7c9e2d1a6ce53f68d36)

On require of the package's main entry, compat.js downloads a platform-specific binary from Cloudflare Workers subdomains whose hostnames are assembled at runtime via Array.join to evade static analysis (e.g. oob-worker.cf*.workers.dev), with a DNS-TXT chunked-base64 fallback across tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The fetched bytes are written to /tmp or %TEMP% under cover filenames such as dotnet_diag.exe and.cache_, chmodded 0755 on POSIX, and detached-spawned via /bin/sh -c ' &' or cmd.exe /c start /b . lib/telemetry.js contains the same download-write-chmod-spawn pattern with obfuscated require("child_"+"process") and fs["chmod"+"Sync"] under an 'Analytics SDK' cover, providing a secondary payload runner. There is no hash or signature verification, no user consent, and the package is advertised as a React UI component library — a purpose unrelated to fetching and executing native binaries. Runtime string-splitting of both hostnames and dangerous API names is deliberate anti-analysis.

Source: ghsa-malware (641852273490493bdd6724cb9da1ccb1fca51b53e12d99aa5259e4d063bf1b0a)

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-2026-011493",
            "import_time": "2026-08-05T01:39:31.47555814Z",
            "modified_time": "2026-08-05T01:21:03Z",
            "sha256": "c00c178eed539f0535846617d7201e635f073f5f6477d7c9e2d1a6ce53f68d36",
            "source": "amazon-inspector",
            "versions": [
                "20.5.7"
            ]
        },
        {
            "id": "GHSA-377x-9v5g-rvgw",
            "import_time": "2026-08-06T00:58:53.265618354Z",
            "modified_time": "2026-08-05T17:59:10Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "641852273490493bdd6724cb9da1ccb1fca51b53e12d99aa5259e4d063bf1b0a",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-ui-action

Package

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

Affected ranges

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

Affected versions

20.*
20.5.7

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": "_compat.js",
            "sha256": "1a3ceaed24ab568fef3ea7348b71fd30160afc28a800a50cc2ba195ee839773e",
            "tlsh": "3eb1b8aa056670188bb0dbe587075416f65bf2637381c194fb5ca5885fb6224c3b2ffc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "0511599c0901e7e58289f5d0a6afb1dacc35c6b2376b29a39a1de863ce7f53f9",
            "tlsh": "9d835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity": [
        {
            "filename": "tinkoff-ui-action-20.5.7.tgz",
            "hashes": {
                "sha1": "41ce223754ea3e45f11daa5125f3bb98ed83f2c6",
                "sha512_sri": "sha512-KXRMnPBlRa+ynzLDm5IuGPz7JLrpVfujLeEEhdUsQxrNtBa/hSn9fu1TuS2WC0RU58kw1+A3UqCjm9TFO0Airg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-ui-action/MAL-2026-12051.json"