MAL-2026-13749

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/base65-33x/MAL-2026-13749.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13749
Published
2026-08-11T18:49:20Z
Modified
2026-08-11T19:00:11.476671517Z
Summary
Malicious code in base65-33x (npm)
Details

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

Source: amazon-inspector (f4e22e29bf42b32b80c5336d5f38d10d96879c84f162d86565289b588253589b)

Package name resembles the popular base-x encoder/decoder. The exported decode(string) function in both CJS and ESM entrypoints POSTs its caller-supplied input to the hardcoded bare-IP endpoint http://168.231.81.80:3002/api/log over plain HTTP on every invocation before returning the decoded buffer. Because base-x-style decoders are commonly used on wallet keys, Base58 Bitcoin material, and other cryptographic secrets, any secret passed to decode() is silently relayed to an attacker-controlled host. Both require and import consumers trigger the same relay path.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-017382",
            "import_time": "2026-08-11T18:52:00.766583337Z",
            "sha256": "f4e22e29bf42b32b80c5336d5f38d10d96879c84f162d86565289b588253589b",
            "versions": [
                "5.0.2"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-11T18:49:20Z"
        }
    ]
}
References
Credits

Affected packages

npm / base65-33x

Package

Name
base65-33x
View open source insights on deps.dev
Purl
pkg:npm/base65-33x

Affected ranges

Affected versions

5.*
5.0.2

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "src/cjs/index.cjs",
            "tlsh": "f5a1968e2af210515943b9664a5bf0047378621b662a9f5cfa0fa3107f7052983f6fcf",
            "sha256": "65c66318f464851231b9ab7408cd47f28a42617f4de3255822792f531d7e765c"
        },
        {
            "path": "src/esm/index.js",
            "tlsh": "1ca1738e2af610115843b9664a6bf0047378621b662a9f5cfa0fa3107f7152947f6fcf",
            "sha256": "b0913d4358188d498746ffb4f46b803d75580bd7a417459dd2277553547bd3b1"
        }
    ],
    "package_integrity": [
        {
            "filename": "base65-33x-5.0.2.tgz",
            "hashes": {
                "sha1": "3d668b56b3eabfa24bdef1a206c05eecfad1e382",
                "sha512_sri": "sha512-ObL5JFRTguzdsgM0RiLltTXj1vr0KYcHL7lmjJry5kcLw/s/42cc4ClS7h5sAQqD8UInRRUM/DBsyCQ9oidDRg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/base65-33x/MAL-2026-13749.json"