MAL-2026-15664

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@yane88/workbuddy/MAL-2026-15664.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15664
Aliases
  • GHSA-v22h-4j6c-58cm
Published
2026-09-01T02:29:07Z
Modified
2026-09-04T01:00:05.955287506Z
Summary
Malicious code in @yane88/workbuddy (npm)
Details

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

Source: amazon-inspector (00baaa53d63c0bababb9db20aa5e86149da604834a5761b827edd2f936178c91)

At npm install time, @yane88/workbuddy@1.0.1's postinstall script pulls three sibling npm packages (@yane88/workbuddy-01, -02, -03), each shipping a PKWARE split-zip volume (.z01/.z02/.zip), concatenates them into a multi-volume ZIP, inflates the contents, and writes WorkBuddy-5.3.5.exe into the package directory with chmod applied. The payload bytes are distributed across separate npm packages rather than shipped in this package's own tarball, there is no hash or signature verification of the reassembled archive, and no README or metadata describes what the executable does or why splitting across packages is necessary. Splitting a Windows PE across multiple sibling packages and reassembling it at install time is a delivery/staging pattern for opaque binary payloads and is not a standard native-addon or prebuild-install workflow.

Source: ghsa-malware (4375d4bea3b8be81239cf8af942cafe012039acfc57c4191ff3bcd639b5d1508)

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": [
        {
            "import_time": "2026-09-01T03:36:05.363995318Z",
            "source": "ghsa-malware",
            "id": "GHSA-v22h-4j6c-58cm",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "modified_time": "2026-09-01T02:29:07Z",
            "sha256": "4375d4bea3b8be81239cf8af942cafe012039acfc57c4191ff3bcd639b5d1508"
        },
        {
            "import_time": "2026-09-04T00:45:55.72366104Z",
            "source": "amazon-inspector",
            "versions": [
                "1.0.1"
            ],
            "id": "IN-MAL-2026-019397",
            "modified_time": "2026-09-03T23:52:03Z",
            "sha256": "00baaa53d63c0bababb9db20aa5e86149da604834a5761b827edd2f936178c91"
        }
    ]
}
References
Credits

Affected packages

npm / @yane88/workbuddy

Package

Name
@yane88/workbuddy
View open source insights on deps.dev
Purl
pkg:npm/%40yane88/workbuddy

Affected ranges

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

Affected versions

1.*
1.0.1

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@yane88/workbuddy/MAL-2026-15664.json"
indicators 
{
    "evidence_files": [
        {
            "path": "postinstall.js",
            "tlsh": "b872945506fb2224902333e81a5b66197934b407360ac99cbf6dd7c05f4f87dcae7ea8",
            "sha256": "c47b422b5edaef3ae2fa57c1522f4cc5e266fd2c1dcae8039cf8d33ebd1cb6bf"
        }
    ]
}
cwes 
[
    {
        "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.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]