MAL-2026-5540

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@monitoring-lib/error-tracking/MAL-2026-5540.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5540
Aliases
  • GHSA-5g45-cfrj-qc64
Published
2026-06-11T01:22:04Z
Modified
2026-06-16T00:01:51.194868644Z
Summary
Malicious code in @monitoring-lib/error-tracking (npm)
Details

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

Source: amazon-inspector (491603ad44ed812c3d248696b00f7d4801a4c1dc23e4f23a3bb86f2ef499616d)

On npm install, the preinstall lifecycle hook in package.json runs a Node one-liner that reads the installer's hostname (os.hostname()) and username (os.userInfo().username) and transmits them to an attacker-controlled Interactsh/OAST callback domain via two channels: an HTTPS GET request to https://d8ks495t5p5ut2enft8041g7fusnfsy5e.oast.site/?h=<hostname>&u=<username> and a DNS lookup of monitoring-lib.<hostname>.d8ks495t5p5ut2enft8041g7fusnfsy5e.oast.site. The package name uses a generic scope (@monitoring-lib) that does not correspond to a known publisher, and the version number 9999.0.0 is the canonical shape of a dependency-confusion attack — a public registry upload designed to override an organization's internal package of the same name. Combined, the package is a supply-chain recon beacon: any installer that resolves to this version leaks its host identity to the attacker, identifying victims whose private-registry configurations failed.

Source: ghsa-malware (0f59213141b2097ff9f1536b9de63f408c6417907dad6cc7d778e024fc4b3219)

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 (160b44403dfdcc6f9b6a3390ac9d1a2a55ed88c8a3cfd660850d573a89682453)

The OpenSSF Package Analysis project identified '@monitoring-lib/error-tracking' @ 9999.0.0 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.
Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "491603ad44ed812c3d248696b00f7d4801a4c1dc23e4f23a3bb86f2ef499616d",
            "id": "IN-MAL-2026-005362",
            "source": "amazon-inspector",
            "import_time": "2026-06-11T02:24:27.854737577Z",
            "modified_time": "2026-06-11T01:48:11Z",
            "versions": [
                "9999.0.0"
            ]
        },
        {
            "sha256": "8100d54eed6cb854340b403b4d22c6b2c4a6abc7780fc1a94c00e1d4a5404625",
            "id": "IN-MAL-2026-005363",
            "source": "amazon-inspector",
            "import_time": "2026-06-11T02:24:27.905843345Z",
            "modified_time": "2026-06-11T01:48:12Z",
            "versions": [
                "9999.0.0"
            ]
        },
        {
            "modified_time": "2026-06-11T01:22:04Z",
            "source": "ossf-package-analysis",
            "import_time": "2026-06-11T02:24:24.741689959Z",
            "sha256": "160b44403dfdcc6f9b6a3390ac9d1a2a55ed88c8a3cfd660850d573a89682453",
            "versions": [
                "9999.0.0"
            ]
        },
        {
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-5g45-cfrj-qc64",
            "source": "ghsa-malware",
            "import_time": "2026-06-15T23:52:17.791347779Z",
            "sha256": "0f59213141b2097ff9f1536b9de63f408c6417907dad6cc7d778e024fc4b3219",
            "modified_time": "2026-06-15T23:38:33Z"
        }
    ]
}
References
Credits

Affected packages

npm / @monitoring-lib/error-tracking

Package

Name
@monitoring-lib/error-tracking
View open source insights on deps.dev
Purl
pkg:npm/%40monitoring-lib%2Ferror-tracking

Affected ranges

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

Affected versions

9999.*
9999.0.0

Database specific

indicators 
{
    "domains": [
        "d8ks495t5p5ut2enft8041g7fusnfsy5e.oast.site",
        "monitoring-lib.scan-99456db80cc7.d8ks495t5p5ut2enft8041g7fusnfsy5e.oast.site"
    ],
    "evidence_files": [
        {
            "path": "package.json",
            "tlsh": "5df0c0b4858090235fe8208807aa610da2c68f0ab16e0c13dde255e743c45f67f76131",
            "sha256": "ef769e339f69d0587da8b112dbf3b827aaaca128564f808bed29ade70e9bcf43"
        }
    ],
    "package_integrity": [
        {
            "filename": "error-tracking-9999.0.0.tgz",
            "hashes": {
                "sha1": "f677dc4bbe961186740398b74581a1043f25f1c3",
                "sha512_sri": "sha512-WShghcdrbPfixkkWgI7ieefxTRESW8w8f/saqVXwrevCrH5ZRnf4kU+Hr+cvhx6i2miMraPU5lpiNaJML+WxLw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@monitoring-lib/error-tracking/MAL-2026-5540.json"
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"
    }
]