MAL-2026-14278

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/layer2-sdk/MAL-2026-14278.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14278
Published
2026-08-19T08:14:26Z
Modified
2026-08-19T08:32:48Z
Summary
Malicious code in layer2-sdk (npm)
Details

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

Source: amazon-inspector (1bd6521302fb3f49a8c444435a33834be40a420972df3a03cadb5fdb3176a68f)

index.js line 75 decodes a base64-encoded string via Buffer.from(..., 'base64').toString('utf8') and passes the result to an evaluator, executing hidden code when the module is loaded. The obfuscated-and-exec'd blob pattern in a package presenting itself as a generic SDK is consistent with a supply-chain dropper: the actual behavior is concealed from casual inspection of the source and runs as a side effect of require()'ing the package. The package name suggests a blockchain/Layer-2 SDK, but the shipped code's only notable operation is decoding and executing an opaque payload.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-018400",
            "import_time": "2026-08-19T08:15:32.113063005Z",
            "modified_time": "2026-08-19T08:14:39Z",
            "sha256": "1652915c889bceaf1545516ceb2a4b902761cc7f5348be22edcbe427c6cd8fee",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-018399",
            "import_time": "2026-08-19T08:15:32.083303043Z",
            "modified_time": "2026-08-19T08:14:26Z",
            "sha256": "1bd6521302fb3f49a8c444435a33834be40a420972df3a03cadb5fdb3176a68f",
            "source": "amazon-inspector",
            "versions": [
                "1.0.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / layer2-sdk

Package

Name
layer2-sdk
View open source insights on deps.dev
Purl
pkg:npm/layer2-sdk

Affected ranges

Affected versions

1.*
1.0.0
1.0.1

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": "index.js",
            "sha256": "523163ba2f1830ddd6d883262cf486b8d4bf082ea592cf37e52229dc89713cb9",
            "tlsh": "6291b3a7a4e6624409b4b4f8aa3b212972d640cfdd14d535f8cca0c89f4d1789172bec"
        }
    ],
    "package_integrity": [
        {
            "filename": "layer2-sdk-1.0.0.tgz",
            "hashes": {
                "sha1": "e4b0dd5f3e1ab989b9317db263630acd0f7b4b56",
                "sha512_sri": "sha512-v0frgo0z7cSD5tkxDptvN/WwNmfsD63r9OV2KxuoC/4AH45MAiDy05l/0A0jm6XNGoEWDa900GcgWHFmLyeRlg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/layer2-sdk/MAL-2026-14278.json"