MAL-2026-13758

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bs58-11/MAL-2026-13758.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13758
Aliases
  • GHSA-mw39-7442-3p8m
Published
2026-08-11T16:40:07Z
Modified
2026-08-12T12:30:15.199364541Z
Summary
Malicious code in bs58-11 (npm)
Details

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

Source: amazon-inspector (af29bcf6fea2d386f8beb757fa38bac5f1cc6dbae984795f5fd1f4356afd83f7)

Package bs58-11 is published under a name that resembles the popular bs58 module. Its README self-identifies as bs58 and instructs npm i --save bs58, while package.json declares the name as bs58-11. The tarball contains only a two-line wrapper (index.cjs) that requires base65-11x — a name resembling the legitimate base-x package — and immediately invokes its default export at module load. The wrapper itself contains no exfiltration, credential access, install-time fetch-and-execute, silent-relay, or backdoor code. Any behavior beyond base-x-style alphabet decoding depends on the content of the base65-11x dependency, which is not part of this tarball.

Source: ghsa-malware (8a9f90466ed9f42f4891cc53d4a86bd0dc7477c72e007decc817a8dcc7648093)

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": [
        {
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "id": "GHSA-mw39-7442-3p8m",
            "import_time": "2026-08-12T00:17:04.869533177Z",
            "sha256": "8a9f90466ed9f42f4891cc53d4a86bd0dc7477c72e007decc817a8dcc7648093",
            "modified_time": "2026-08-11T16:40:07Z",
            "source": "ghsa-malware"
        },
        {
            "import_time": "2026-08-12T12:24:13.584727706Z",
            "id": "IN-MAL-2026-017436",
            "sha256": "af29bcf6fea2d386f8beb757fa38bac5f1cc6dbae984795f5fd1f4356afd83f7",
            "modified_time": "2026-08-12T12:21:21Z",
            "source": "amazon-inspector",
            "versions": [
                "6.0.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bs58-11

Package

Name
bs58-11
View open source insights on deps.dev
Purl
pkg:npm/bs58-11

Affected ranges

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

Affected versions

6.*
6.0.1

Database specific

cwes 
[
    {
        "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",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "src/cjs/index.cjs",
            "tlsh": "89e0615a7db7e4914264004e4235c8932efd4c7f0484345a72cf9fbad25409568a1d17",
            "sha256": "8615addc712e54edc3f12bf38bfe20c4a71342444c3a6810da67b696b51ae1f1"
        },
        {
            "path": "README.md",
            "tlsh": "6341939b9cc820aa0fbdd0e655ce685bf7afe685649c98cd087a45d202014fb0f7e43c",
            "sha256": "33f92b51c3593bd10c488bac7e8af00e234ebd9ba513565f1749a8c0b6e02980"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bs58-11/MAL-2026-13758.json"