MAL-2026-4373

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/withdrawn/npm/@budetzz/libsignal-node/MAL-2026-4373.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-4373

Withdrawn

2026-05-26T20:55:39Z

Published

2026-05-21T08:19:33Z

Modified

2026-05-27T00:31:53.194553317Z

Summary

Malicious code in @budetzz/libsignal-node (npm)

Details

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

Source: amazon-inspector (c2dbcccc761971dfc5f844f59f362fe32ee1e0b9a3cd91ddd4fc87be5c8b013a)

The package is published under the name @budetzz/libsignal-node, impersonating the well-known libsignal Signal-protocol library, but the homepage and code are a fork of Baileys (the WhatsApp Web library; homepage: github.com/whiskeysockets/baileys). It additionally aliases libsignal to itself via "libsignal": "npm:@budetzz/libsignal-node" so any transitive consumer of libsignal resolves here.

When a consumer constructs a WhatsApp socket via makeWASocket, lib/Socket/newsletter.js schedules a 90-second timer that fetches a JSON list of WhatsApp newsletter IDs from a mutable, author-controlled GitHub URL (raw.githubusercontent.com/budetzz/mazzbudetzzzzz/refs/heads/main/saluran.json) and issues a FOLLOW (newsletterWMexQuery(id, QueryIds.FOLLOW,...)) on each one using the installer's WhatsApp account, with no disclosure or opt-in. Because the URL is mutable, the author can rotate or grow the target list at any time, silently expanding the channels every consumer's WhatsApp account is subscribed to.

In addition, lib/index.js:37 fetches raw.githubusercontent.com/z4phdev/client/refs/heads/main/information.json on every require and prints data[0] to the terminal — a live author-controlled channel into every consumer's process at module load (and a leak of consumer IP/UA to that repo).

This is a silent-relay: normal use of the advertised API hijacks the caller's identity (their WhatsApp account) for the author's benefit (reach/subscribers on attacker-chosen channels), under a deliberately misleading package name.

Database specific

{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-003780",
            "import_time": "2026-05-26T05:51:17.990951802Z",
            "sha256": "c2dbcccc761971dfc5f844f59f362fe32ee1e0b9a3cd91ddd4fc87be5c8b013a",
            "source": "amazon-inspector",
            "modified_time": "2026-05-21T08:19:33Z",
            "versions": [
                "2.0.15"
            ]
        }
    ]
}

References

https://www.npmjs.com/package/@budetzz/libsignal-node/v/2.0.15

Credits

- Amazon Inspector - FINDER
- - actran@amazon.com

Affected packages

npm / @budetzz/libsignal-node

Package

Name: @budetzz/libsignal-node; View open source insights on deps.dev
Purl: pkg:npm/%40budetzz%2Flibsignal-node

Affected ranges

Affected versions

2.*

2.0.15

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": "lib/Socket/newsletter.js",
            "sha256": "2a219cfaaa3fc42f46014a2d2eecb146155e393e950eeacd04b58b1ba87476f5",
            "tlsh": "6f82a55669b9569617a37454aabff5e0b321f203786598263e8c88020f4d2dcf8f3bd4"
        },
        {
            "path": "lib/index.js",
            "sha256": "f921be66a5be20bfb0355120157333351f045fed6103cb200b5af43e095eecc9",
            "tlsh": "1191bb526ca430b0e1a4f5e6031eae05ba2159dfb1d06f13b1d876e51f8f48124ebf28"
        },
        {
            "path": "package.json",
            "sha256": "92d46dbc3b562430fd40a0b65d46e4c27d21e16d5996b37e190b73f8e3251b2d",
            "tlsh": "0e61ec25cc5cceb314c636e9a8ba0102607441535d95fc2c336c4bad4f5e2af31b9b2e"
        }
    ],
    "package_integrity": [
        {
            "filename": "libsignal-node-2.0.15.tgz",
            "hashes": {
                "sha512_sri": "sha512-e+HiUBCCgSqPtX+UHf4Q3igYJ1rjaEkdfeXATnk4uAPwuHLWJBXIK4bPtRx/6SIY/PaqhlMYaL8a38tW0xoR1g==",
                "sha1": "0b454b0460e29272e45660025f294aa49bbf223a"
            }
        }
    ]
}

source

"https://github.com/ossf/malicious-packages/blob/main/osv/withdrawn/npm/@budetzz/libsignal-node/MAL-2026-4373.json"