MAL-2026-4188

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@limebike/supreme/MAL-2026-4188.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4188
Aliases
  • GHSA-9x95-pwr5-8g32
Published
2026-05-20T12:57:24Z
Modified
2026-05-27T23:16:43Z
Summary
Malicious code in @limebike/supreme (npm)
Details

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

Source: amazon-inspector (4f65cdcb27200e24464982c0678d9dd556342d53886e4d5378da5d9c664fe1c7)

Both preinstall and postinstall lifecycle hooks in package.json execute index.js, which collects the installer's hostname, non-internal network interface IPs, current working directory, package name, and the value of the SECURITY_BUG_BOUNTY_DOCTOLIB_IS_PWN environment variable, and POSTs the JSON payload to http://poc.khz.bar/install over plain HTTP. This fires automatically on npm install without any user action. The package name @limebike/supreme combined with the bug-bounty-themed environment-variable name and exfil host suggests a dependency-confusion proof-of-concept targeting an internal scope, but the structural behavior — unconditional install-time beacon of installer identity to a third-party host over cleartext HTTP — is identical to a supply-chain exfiltration attack and produces a tangible signal for the operator of poc.khz.bar identifying every machine that installed the package.

Source: ghsa-malware (5cae8c5e6d35571409c86e7b77a3fe40d1bb1c763ce736029375f41628e11d71)

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": "GHSA-9x95-pwr5-8g32",
            "import_time": "2026-05-20T17:21:42.623491924Z",
            "modified_time": "2026-05-20T16:44:52Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "5cae8c5e6d35571409c86e7b77a3fe40d1bb1c763ce736029375f41628e11d71",
            "source": "ghsa-malware"
        },
        {
            "id": "IN-MAL-2026-003533",
            "import_time": "2026-05-26T05:50:48.551928897Z",
            "modified_time": "2026-05-20T12:57:25Z",
            "sha256": "975c8c2d640913450f35edef428d4de749504a07a74718085d39bce96a67cea4",
            "source": "amazon-inspector",
            "versions": [
                "85.14.44"
            ]
        },
        {
            "id": "IN-MAL-2026-003549",
            "import_time": "2026-05-26T05:50:50.301193167Z",
            "modified_time": "2026-05-20T13:35:48Z",
            "sha256": "ba1e295ee15f50f31d22dbabb954522f38aaaa080b74f0db50cd298787d8d58a",
            "source": "amazon-inspector",
            "versions": [
                "85.14.46"
            ]
        },
        {
            "id": "IN-MAL-2026-003550",
            "import_time": "2026-05-26T05:50:50.406551735Z",
            "modified_time": "2026-05-20T13:35:49Z",
            "sha256": "ba8eb092bfb98e7fd0c2f662a6a379ead766017d219d7ab60a7ebdbc0def8299",
            "source": "amazon-inspector",
            "versions": [
                "85.14.46"
            ]
        },
        {
            "id": "IN-MAL-2026-003532",
            "import_time": "2026-05-26T05:50:48.349209031Z",
            "modified_time": "2026-05-20T12:57:24Z",
            "sha256": "4f65cdcb27200e24464982c0678d9dd556342d53886e4d5378da5d9c664fe1c7",
            "source": "amazon-inspector",
            "versions": [
                "85.14.44"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @limebike/supreme

Package

Name
@limebike/supreme
View open source insights on deps.dev
Purl
pkg:npm/%40limebike%2Fsupreme

Affected ranges

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

Affected versions

85.*
85.14.44
85.14.46

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "domains": [
        "poc.khz.bar"
    ],
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "e987bdc90feb3d688be03bbdee5e86122b3b4bfe9105fc349c4e2e413655bf47",
            "tlsh": "4821d0b295b7a2a516f961e8551aac06d27bc1033b0ab95077dc06746fce87e04f07e8"
        },
        {
            "path": "README.md",
            "sha256": "adc9baf6a61fa76788af8c0bb8d28a5eba201c03ea1db292e30b38714ef7031c",
            "tlsh": "f9a02400d5431c503d0c01447f3050c014403071533d37131fd40003c4cfc754141734"
        }
    ],
    "package_integrity": [
        {
            "filename": "supreme-85.14.46.tgz",
            "hashes": {
                "sha1": "05d536c33a143061c5a56cb38a0c1cc668c3a875",
                "sha512_sri": "sha512-nFNa2Wy7glv8qdRgrrLQ2W+bodPoXWp3ovYB/oDGuW2gzyat2OIHhzWx6jHIfVld4IrJ6HvQCyw+9jRXT38grw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@limebike/supreme/MAL-2026-4188.json"