MAL-2026-6502

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/js-client-node/MAL-2026-6502.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6502
Aliases
  • GHSA-x7hp-6x9v-c662
Published
2026-06-26T04:07:22Z
Modified
2026-07-31T01:38:34.072018635Z
Summary
Malicious code in js-client-node (npm)
Details

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

Source: amazon-inspector (341a29bc48b39d363662fe66dcf13ca9bc3db921cdae84e53b070fc7b3a935a2)

package.json declares a postinstall hook (node dist/postinstall.js) that runs automatically on npm install. The hook invokes prices() in dist/index.js, which resolves the installer's project root via process.env.INIT_CWD?? process.cwd(), locates .env at that root, parses it with dotenv, and POSTs the full JSON of every environment variable to a remote URL. The destination URL is hidden using a hand-rolled base58 decoder, with the encoded URL split across two files: ENCODED_URL_PART_A = '82kPqoBYiy7cYp9Y4JoN' in dist/index.js and ENCODED_URL_PART_B = 'ZWfGP1a9afkaPxYp37FZgsTX' in dist/cli.js, concatenated and decoded at runtime. Errors are silently swallowed so npm install shows no warning. The package's identity is a deliberate decoy: package.json describes it as 'fetch all crypto prices' under the name js-client-node, while README.md is copy-pasted verbatim from @types/node. Any developer installing this package will leak the contents of their project's.env file (API keys, database credentials, cloud tokens) to the attacker on install.

Source: ghsa-malware (fb25890a2068dbec1aec4caa60bc8df48c764504334ccd23eb91cd99ab2ea1ef)

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": [
        {
            "id": "IN-MAL-2026-007588",
            "import_time": "2026-06-26T04:57:28.903991166Z",
            "sha256": "341a29bc48b39d363662fe66dcf13ca9bc3db921cdae84e53b070fc7b3a935a2",
            "modified_time": "2026-06-26T04:07:22Z",
            "versions": [
                "1.4.0"
            ],
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-07-31T01:10:09.734681083Z",
            "sha256": "fb25890a2068dbec1aec4caa60bc8df48c764504334ccd23eb91cd99ab2ea1ef",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "modified_time": "2026-07-30T12:29:39Z",
            "id": "GHSA-x7hp-6x9v-c662",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / js-client-node

Package

Name
js-client-node
View open source insights on deps.dev
Purl
pkg:npm/js-client-node

Affected ranges

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

Affected versions

1.*
1.4.0

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-oVxWkesEzCZovcv4n0q3A2nviO/HGQS84lVnQZUSX00aZwu2+3bO/4LETYJ97Nebcynd8F/Vw0VYftb2YQf6kg==",
                "sha1": "3ebaf8a7f5d731d5edfbb463cdb8ca1fb3c41b7d"
            },
            "filename": "js-client-node-1.4.0.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "dist/index.js",
            "sha256": "b8ab49918d9b5cc2f48e1e4f56a9323b34a69d8354e279863f61ea303d2b3bb3",
            "tlsh": "4d9184162df3a7230a9367989317801a6fbc97173504e888b55ed3947f8901ca5a7bb4"
        },
        {
            "path": "README.md",
            "sha256": "2bdb487625dbf4299e5eb58b2954c184dcaa8c52c2162456f4efa4941787543d",
            "tlsh": "293121f7144549891f022ec4c8c8a02df723a049ede58ccae462c134c45a67757bf628"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/js-client-node/MAL-2026-6502.json"