MAL-2026-5746

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/xy-shared/MAL-2026-5746.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5746
Published
2026-06-13T20:10:25Z
Modified
2026-06-13T20:46:41.360762989Z
Summary
Malicious code in xy-shared (npm)
Details

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

Source: amazon-inspector (d631443367624273d8b7d3347b2e173a72f3f7447424f25424dab8e68c4b1a25)

package.json wires both preinstall and postinstall to node callback.js, which auto-executes on npm install. callback.js collects username, uid/gid, hostname, home directory, cwd, local network interfaces, and the external IP (fetched from api.ipify.org). It enumerates CI metadata (GITHUBREPOSITORY, GITHUBACTOR, GITLABUSERLOGIN, JENKINSURL, BUILDNUMBER, etc.) and probes for the presence of AWSACCESSKEYID, GITHUBTOKEN, NPMTOKEN, and DOCKERPASSWORD in the environment. The aggregated JSON is POSTed to a hardcoded Discord webhook (discord.com/api/webhooks/1515440532359352331/...). A secondary covert channel base64-encodes package name, username, hostname, and a timestamp into a DNS subdomain and issues a dns.resolve query to leak the data when HTTP egress is restricted. The package is published at version 999.0.0 under a generic shared-library name — the canonical dependency-confusion shape designed to outrank internal xy-shared packages in resolvers that mix public and private registries. Self-described 'PoC' framing does not change the installer-side impact: any build that resolves this package leaks identity and CI-secret-presence flags to an attacker-controlled endpoint.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-006364",
            "import_time": "2026-06-13T20:33:18.212589581Z",
            "sha256": "d631443367624273d8b7d3347b2e173a72f3f7447424f25424dab8e68c4b1a25",
            "source": "amazon-inspector",
            "modified_time": "2026-06-13T20:10:25Z",
            "versions": [
                "999.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-006365",
            "import_time": "2026-06-13T20:33:18.238585648Z",
            "sha256": "dce85557643b0c4f8c9657100700bfb7ba8384da7bbc6ef44b907edf3b5db11e",
            "source": "amazon-inspector",
            "modified_time": "2026-06-13T20:10:25Z",
            "versions": [
                "999.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / xy-shared

Package

Name
xy-shared
View open source insights on deps.dev
Purl
pkg:npm/xy-shared

Affected ranges

Affected versions

999.*
999.0.0

Database specific

indicators 
{
    "evidence_files": [
        {
            "path": "callback.js",
            "sha256": "ddce4d44730496bce729312531ca761103b8eb0e3063155487d70896a2930edd",
            "tlsh": "4b12d9a566b1561005a347902a0fa416327af1572756deb0bb9c43182fc1b3c93f2efa"
        },
        {
            "path": "package.json",
            "sha256": "5e568b26c783fba8f396c76b696e15cffb556f11d60f708142930c9ac84676f0",
            "tlsh": "16e0682458255d333cd08aeb042a631a2020dd0b141c3c087b630198a38ebb75aba29e"
        }
    ],
    "package_integrity": [
        {
            "filename": "xy-shared-999.0.0.tgz",
            "hashes": {
                "sha512_sri": "sha512-ZGkvBJnz+NkoPJEfeoemyhPQRPcz6l/cbsVGwxKYSXTB//7i+s9f2LuZr0s5ZswzIQKm1hxqXKdLfwrbGEzx1g==",
                "sha1": "f8ce83c71968a70a297a105967aa0bb2dcd09ff2"
            }
        }
    ],
    "ips": [
        "172.67.74.152",
        "104.26.13.205",
        "162.159.138.232",
        "162.159.137.232",
        "104.26.12.205",
        "162.159.135.232"
    ],
    "domains": [
        "api.ipify.org",
        "discord.com",
        "eyjwijoiehktc2hhcmvkiiwidsi6innjyw4ilcjoijoic2nhbi.discord.com"
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/xy-shared/MAL-2026-5746.json"