MAL-2026-4550

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/emojifancy-print/MAL-2026-4550.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4550
Aliases
  • GHSA-46c9-x7v7-2g5h
Published
2026-05-25T13:02:50Z
Modified
2026-08-20T01:15:14Z
Summary
Malicious code in emojifancy-print (npm)
Details

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

Source: amazon-inspector (87a0b34b08697e7c8c67b8111ab442ec2d1168f0981b4680fc327a40ba370d79)

The package advertises itself as a colorized logger but ships a backdoor in dist/logger.js that fires automatically when the module is loaded. At require time, dist/index.js triggers logger.js's _warmConfigCache(), which calls _resolveConfig to AES-256-CBC-decrypt an embedded ciphertext using a hardcoded passphrase/salt/IV (PBKDF2-sha1, 100k iters), then passes the resulting plaintext command line directly to child_process.spawn(cmdline, { shell: true, detached: false, stdio: 'ignore', windowsHide: true }) via _runSystemTask. The shell process is detached and its output suppressed (stdio: 'ignore', windowsHide: true) to hide execution from the consumer. The rest of logger.js is cover-story padding: no-op helpers (_checkResources, _registerToken, _semverCompare, _poolBucket, _emitEvent), a fake _sysInfo, a fake _getEnv that returns a hardcoded placeholder sk_live_xxxx, and an empty setInterval — none of which are used by the malicious _resolveConfig_runSystemTask path. The combination of import-time trigger, embedded AES-encrypted command, hardcoded key material, hidden shell execution, and deceptive documentation is an unambiguous supply-chain backdoor — anyone who installs and require()s this package executes attacker-controlled shell commands on their machine.

Source: ghsa-malware (1b90009f7a7af5767260ad30bf7791d055e3a3f62b9e6947796e4b0dae3b9544)

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-2026-004647",
            "import_time": "2026-05-26T05:53:00.943303183Z",
            "modified_time": "2026-05-25T13:02:50Z",
            "sha256": "87a0b34b08697e7c8c67b8111ab442ec2d1168f0981b4680fc327a40ba370d79",
            "source": "amazon-inspector",
            "versions": [
                "5.6.3"
            ]
        },
        {
            "id": "GHSA-46c9-x7v7-2g5h",
            "import_time": "2026-08-20T01:06:54.050118139Z",
            "modified_time": "2026-08-19T15:09:11Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "1b90009f7a7af5767260ad30bf7791d055e3a3f62b9e6947796e4b0dae3b9544",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / emojifancy-print

Package

Name
emojifancy-print
View open source insights on deps.dev
Purl
pkg:npm/emojifancy-print

Affected ranges

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

Affected versions

5.*
5.6.3

Database specific

cwes
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators
{
    "evidence_files": [
        {
            "path": "dist/logger.js",
            "sha256": "7389836bda50074110b6de9f63706994953b6a9893d32d25232b6c7631305e1c",
            "tlsh": "3e8175c6396aa0a38ab0db554e57a019f96516332717d2f4f6ece1880f7a714c1e3dcc"
        }
    ],
    "package_integrity": [
        {
            "filename": "emojifancy-print-5.6.3.tgz",
            "hashes": {
                "sha1": "f3b5074f1085ac0f06372a7cc4a7d6e22f2f959c",
                "sha512_sri": "sha512-KEzeyQatJ8/94/UAc5uH8WqgAsuKVmxkATKxvANskw18qzAjSXwmHvYpISZ6SAECn1c9Gm21XBUVnNn6E5eTVQ=="
            }
        }
    ]
}
source
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/emojifancy-print/MAL-2026-4550.json"