MAL-2026-17689

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@galicia-toolkit/error-master/MAL-2026-17689.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17689
Aliases
  • GHSA-42vv-c8c8-q765
Published
2026-10-08T16:23:00Z
Modified
2026-10-08T17:30:16Z
Summary
Malicious code in @galicia-toolkit/error-master (npm)
Details

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

Source: amazon-inspector (64345fa1c5c24196376e1a0cc8c14b6dcf3898e972b0b6fc23ae8f19d67b6f11)

On npm install, this package's postinstall script (node postinstall.js) hex-encodes the installer's hostname, current working directory, platform/arch/Node version, and USER/USERNAME/LOGNAME values, and emits DNS queries whose subdomains encode that data under the hardcoded author-controlled zone oob.s4yhii.com, using an authoritative resolver as an out-of-band exfiltration channel. The package name and the version number 999.0.3 are consistent with a dependency-confusion payload shape designed to win resolution against an internal @galicia-toolkit/error-master package. The DNS-tunnel beacon fires automatically at install time with no installer action beyond npm install, leaking host and user identifiers to the attacker's authoritative nameserver.

Source: ghsa-malware (26405e431ce3fc8ada12515c167aa0fcc8205369a5b43e6097db28fe579f3784)

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-42vv-c8c8-q765",
            "import_time": "2026-10-08T16:32:56.937555377Z",
            "modified_time": "2026-10-08T16:23:01Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "26405e431ce3fc8ada12515c167aa0fcc8205369a5b43e6097db28fe579f3784",
            "source": "ghsa-malware"
        },
        {
            "id": "IN-MAL-2026-021222",
            "import_time": "2026-10-08T17:17:19.651444933Z",
            "modified_time": "2026-10-08T17:08:33Z",
            "sha256": "64345fa1c5c24196376e1a0cc8c14b6dcf3898e972b0b6fc23ae8f19d67b6f11",
            "source": "amazon-inspector",
            "versions": [
                "999.0.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @galicia-toolkit/error-master

Package

Name
@galicia-toolkit/error-master
View open source insights on deps.dev
Purl
pkg:npm/%40galicia-toolkit/error-master

Affected ranges

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

Affected versions

999.*
999.0.3

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": "postinstall.js",
            "sha256": "14f11babedc67602e606cd4433febbb8a2b45da061a382bfa3f4bba1810e5a3e",
            "tlsh": "ca11142cd360d2b889727ac4a0c44c67157bf3d137e0d2f3641e189207f71b546664ba"
        }
    ],
    "package_integrity": [
        {
            "filename": "error-master-999.0.3.tgz",
            "hashes": {
                "sha1": "9fff4b07a64cba321e7f7cb2afb4933af90c217e",
                "sha512_sri": "sha512-jeJeCMghbKOwInRFou25KtUBOIED7sP8JzMeUZz1Zn47mcjRlEPL3eQZ/YyfKpC6QpHp1Xoe0ZrHz+rODPA4Bg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@galicia-toolkit/error-master/MAL-2026-17689.json"