MAL-2026-12513

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/async-mutex-lock/MAL-2026-12513.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12513
Aliases
  • GHSA-vwr9-j5fc-42fq
Published
2026-08-05T13:10:04Z
Modified
2026-08-06T01:20:06.672960951Z
Summary
Malicious code in async-mutex-lock (npm)
Details

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

Source: amazon-inspector (e195fef439eb6af3d28576857a30030e4bd839406fa36b2f939279743f12188e)

The package is advertised as a mutex-lock utility but ships none of the documented API (no Mutex/lock/unlock). Its sole export, getPlugin in index.js, assembles a URL from split protocol/domain/path variables resolving to https://31.97.137.157:45000/icons/108, fetches a JSON response, and passes the response field data.credits to new Function(...) invoked with full require/process/Buffer context — executing attacker-controlled JavaScript on the caller's host. Variable framing references CDN names (cloudflare, fastly, akamai, cdnjs/font-awesome) as a decoy over a bare-IP destination unrelated to any CDN. Declared dependencies (@primno/dpapi, node-machine-id, better-sqlite3, socket.io-client) are consistent with infostealer staging (DPAPI decryption, machine fingerprinting, SQLite reads of browser stores, socket-based C2). The name resembles the popular async-mutex package.

Source: ghsa-malware (1f07bc4e9d844bdfd01a18eb7fb1efecbba0e9a1380f2b23bddf708fa4c24c52)

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": [
        {
            "import_time": "2026-08-05T14:19:42.03850959Z",
            "modified_time": "2026-08-05T13:10:04Z",
            "sha256": "e195fef439eb6af3d28576857a30030e4bd839406fa36b2f939279743f12188e",
            "id": "IN-MAL-2026-014909",
            "versions": [
                "5.3.1"
            ],
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-08-06T00:58:53.461562746Z",
            "sha256": "1f07bc4e9d844bdfd01a18eb7fb1efecbba0e9a1380f2b23bddf708fa4c24c52",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-vwr9-j5fc-42fq",
            "modified_time": "2026-08-05T13:16:30Z",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / async-mutex-lock

Package

Name
async-mutex-lock
View open source insights on deps.dev
Purl
pkg:npm/async-mutex-lock

Affected ranges

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

Affected versions

5.*
5.3.1

Database specific

cwes 
[
    {
        "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",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-XMwe9sjfqTKPq662WQk4YCcp5FUftDQzPj67InZkXZOIwpWUNXXmzQRtSnuYlNYRy8wnQzow8uTUq4e6TzOb+g==",
                "sha1": "aad7467cd41e731a0f1d75f7030fcb45941e590a"
            },
            "filename": "async-mutex-lock-5.3.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "b32a47cdb5e747380766a568efbd9e5bf0439d5e1ec09f52ad0c696895fc658b",
            "tlsh": "82c1716546fa31a36a63e0eef30f10027265e313375de931f48e42902fca568e5f24e8"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/async-mutex-lock/MAL-2026-12513.json"