MAL-2026-5351

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@demica/shared/MAL-2026-5351.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5351
Published
2026-06-09T07:53:11Z
Modified
2026-06-09T18:01:34.373834979Z
Summary
Malicious code in @demica/shared (npm)
Details

Note: This report is updated by a verification record

Dep-confusion squat of internal @demica/shared at sentinel high version 99.99.100 + auto-exec postinstall (canary.js) beaconing to RAW IP 157.230.17.236:80/dc. Sentinel-high-version + auto-exec beacon = MALICIOUS per operator policy (c913); "authorized canary" framing does NOT downgrade, raw-IP dest matches masterkrweb. 6-pkg @demica canary campaign.

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

Source: amazon-inspector (dfc020ab633bac129072df0d74deea8e0a2e118b43dbebf01ba9bbf2b13b6e76)

@demica/shared@99.99.100 declares postinstall: node canary.js postinstall in package.json, which fires automatically on npm install. canary.js issues a plaintext HTTP GET to bare IP 157.230.17.236:80 at path /dc?... with query parameters including os.hostname(), the package name/version, a nonce, and the lifecycle phase. The installer's host identifier is disclosed to a third-party endpoint over unauthenticated HTTP without consent. The package self-describes as a 'dependency-confusion canary' and uses an inflated version (99.99.100) under the @demica scope to outrank a presumed internal package of the same name — the canonical dependency-confusion attack shape. Regardless of the operator's stated intent, any party that resolves this public package on npm install is beaconed to an attacker-shaped destination (bare IP, plaintext HTTP, no opt-out).

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-005010",
            "import_time": "2026-06-09T17:45:48.736420074Z",
            "sha256": "dfc020ab633bac129072df0d74deea8e0a2e118b43dbebf01ba9bbf2b13b6e76",
            "source": "amazon-inspector",
            "modified_time": "2026-06-09T17:17:04Z",
            "versions": [
                "99.99.100"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @demica/shared

Package

Name
@demica/shared
View open source insights on deps.dev
Purl
pkg:npm/%40demica%2Fshared

Affected ranges

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

Affected versions

99.*
99.99.100

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "canary.js",
            "sha256": "f0e043a9aa214fb0e7b51f2db91b34110f86ec47d1b9f986817ecfab32db66a2",
            "tlsh": "a0011edb48b1e27223f608caa0630e67f212d291326bacf07c8809411f8e88c4276994"
        },
        {
            "path": "package.json",
            "sha256": "916dd2a16d4bcb559c5da020f7768ca235bc374942a61ffdd6c9b2758c4264c2",
            "tlsh": "b0e055209a100d3721d815d90c6e406391630c2b0a043d2873af405c575e3b726ff22e"
        }
    ],
    "package_integrity": [
        {
            "filename": "shared-99.99.100.tgz",
            "hashes": {
                "sha512_sri": "sha512-pHwqm1rzcY74zztUBYZUW8fBzIPAI4pqH621RewuSQ78aZ2jpu6FEtOjydE1LxQcKVfhyapcAm3daqpQqR0F5A==",
                "sha1": "d65f625818583c60e1a94e298d6e8c2b64ac2783"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@demica/shared/MAL-2026-5351.json"