MAL-2026-13631

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/localization-fixer/MAL-2026-13631.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13631
Published
2026-08-08T00:51:34Z
Modified
2026-08-08T01:05:00.023616610Z
Summary
Malicious code in localization-fixer (npm)
Details

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

Source: amazon-inspector (72446c1307e81047c64d819d3485fa77062061c8c9d4d0b38b42e311137c8701)

On require of the package's main entry, a top-level if (isServer) syncLanguageSystem() fetches a JSON payload from https://api.jsonbin.io/v3/b/6a764665da38895dfec7cd5d and executes the returned record.value field as JavaScript, both by writing it to a temp file and running it via child_process.fork and via new Function('require', payload)(require) in a separate module-load IIFE that pulls https://api.jsonbin.io/v3/b/6a718a58da38895dfeb6e2ed. Both sinks pass the Node require to the constructed function, granting full Node capabilities to whatever the mutable jsonbin.io bin currently serves. Function and variable names (syncLanguageSystem, LANG_SOURCE, lang_pass_key) frame the fetch-and-exec as a localization-sync feature, but the advertised purpose of the package has no need to evaluate remote bytes. The jsonbin.io bins are attacker-mutable, so the payload delivered to any installer is arbitrary and can change at any moment.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "72446c1307e81047c64d819d3485fa77062061c8c9d4d0b38b42e311137c8701",
            "source": "amazon-inspector",
            "versions": [
                "1.1.1"
            ],
            "import_time": "2026-08-08T00:53:09.934973234Z",
            "modified_time": "2026-08-08T00:51:51Z",
            "id": "IN-MAL-2026-017195"
        },
        {
            "source": "amazon-inspector",
            "sha256": "cce6487bd92f993e2f16873190e8e9f9fa5727509802c1db2a37e8be70c26343",
            "versions": [
                "1.0.1"
            ],
            "import_time": "2026-08-08T00:53:09.819332415Z",
            "modified_time": "2026-08-08T00:51:34Z",
            "id": "IN-MAL-2026-017193"
        }
    ]
}
References
Credits

Affected packages

npm / localization-fixer

Package

Name
localization-fixer
View open source insights on deps.dev
Purl
pkg:npm/localization-fixer

Affected ranges

Affected versions

1.*
1.0.1
1.1.1

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "02fcc9171b937628ac2bfbbaa87af3ded1b9f944",
                "sha512_sri": "sha512-j1QWe/U905M2umxzjWv0YTY/KuQzwcXltN5OE6AgNUoiU/vIpnS5lXsReaAvTogEpiAGRTJ8QD9L8Ac1iHhf9A=="
            },
            "filename": "localization-fixer-1.1.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "dist/index.js",
            "sha256": "f001ddcd9587deed867673cd4900b1f67814939777406d6bd72691dceee22479",
            "tlsh": "461266c99a93e2224473b376871f5014fd3a942b03369b457d9ec1112fb056cc3eaee9"
        },
        {
            "path": "dist/utils.js",
            "sha256": "7d80b0b8279c7953e5bfd8df57ed649b6d44a2e99280850913d7077725378ab5",
            "tlsh": "eb81438597a2f1134533b3b2971f5414f83ad82602379a86ba9dc5512fb086c83fade4"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/localization-fixer/MAL-2026-13631.json"