MAL-2026-5098

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/js-shared-modules/MAL-2026-5098.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5098
Aliases
  • GHSA-57xw-xm2f-j2wc
Published
2026-05-31T10:18:28Z
Modified
2026-07-15T05:20:00.794751325Z
Summary
Malicious code in js-shared-modules (npm)
Details

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

Source: amazon-inspector (b5d28882e3ff8afe78db631ca5e1129d2b08f976f17f66ffe2b14834184ce09a)

package.json declares "postinstall": "node poc.js", which fires automatically on every npm install. poc.js reads os.hostname(), hex-encodes it, and issues an HTTPS GET to zcpesvvighyuzqlzkqgdydwp9jn54hfeg.oast.fun (an Interactsh out-of-band callback host), exfiltrating the installer's hostname to a third-party canary. The package has no legitimate functionality — index.js is an empty module.exports = {} and the source banner self-identifies as a dependency-confusion proof-of-concept squatting a generic internal-style name (js-shared-modules) to shadow a private package. Any installer who resolves this public package leaks their host identity to the canary domain.

Source: ghsa-malware (71f1956c8ec363e171cc59e00379a59e6df39528dfea5e432432b29d840dfe5a)

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.

Source: ossf-package-analysis (adff3edac3c3ba1c04ba273f77d51c95d153b4e027ec4809b3d2f3c74a712a92)

The OpenSSF Package Analysis project identified 'js-shared-modules' @ 1.11.7 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.
Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "adff3edac3c3ba1c04ba273f77d51c95d153b4e027ec4809b3d2f3c74a712a92",
            "import_time": "2026-05-31T10:42:27.328203348Z",
            "modified_time": "2026-05-31T10:18:28Z",
            "source": "ossf-package-analysis",
            "versions": [
                "1.11.7"
            ]
        },
        {
            "versions": [
                "1.11.7"
            ],
            "sha256": "b5d28882e3ff8afe78db631ca5e1129d2b08f976f17f66ffe2b14834184ce09a",
            "import_time": "2026-06-12T19:44:19.86778993Z",
            "modified_time": "2026-06-12T19:11:16Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-006206"
        },
        {
            "source": "amazon-inspector",
            "sha256": "049751b3dab69252bcd81a407ac98a3bafb4efade81a2428d2bd858ca2a7c7b2",
            "import_time": "2026-06-12T19:44:19.959782719Z",
            "modified_time": "2026-06-12T19:11:17Z",
            "id": "IN-MAL-2026-006207",
            "versions": [
                "1.11.7"
            ]
        },
        {
            "source": "ghsa-malware",
            "sha256": "71f1956c8ec363e171cc59e00379a59e6df39528dfea5e432432b29d840dfe5a",
            "import_time": "2026-07-15T05:00:56.782434288Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-57xw-xm2f-j2wc",
            "modified_time": "2026-07-15T02:48:30Z"
        }
    ]
}
References
Credits

Affected packages

npm / js-shared-modules

Package

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

Affected ranges

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

Affected versions

1.*
1.11.7

Database specific

cwes 
[
    {
        "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",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "js-shared-modules-1.11.7.tgz",
            "hashes": {
                "sha1": "fc600c65b96e56cc589067dcd44770ab074a0df2",
                "sha512_sri": "sha512-Hc/9EnCKbOAsPfDjjKefjPxAQ/r00j9ZoWcwo1gK/lA8bAs7RhG+TbZ5DTVLrZ0CfBslu+KfJeGcLUAJnCUoyQ=="
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "cc21bb7e98fd52307a3520c0a867885f7583af76b502f88468cc02bb4bd6f99401e07d",
            "sha256": "2f9d6406cf6bc38ab4d207c34d7a21b98efac840302b11f74ae4a809af915fcd",
            "path": "poc.js"
        }
    ],
    "domains": [
        "zcpesvvighyuzqlzkqgdydwp9jn54hfeg.oast.fun"
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/js-shared-modules/MAL-2026-5098.json"