MAL-2026-6336

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sync-external/MAL-2026-6336.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6336
Aliases
  • GHSA-vrc4-g2p2-9895
Published
2026-06-23T15:38:44Z
Modified
2026-06-23T21:46:27.700524374Z
Summary
Malicious code in sync-external (npm)
Details

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

Source: amazon-inspector (dc297a0deaba794fdbfccc280a79c7cc895f21fc4e0122b1fba1bc4759b66c3f)

The package ships an obfuscated JavaScript file at shim/index.js using hex-style identifier mangling (_0x391f3f, _0x3eff0a, _0x534564, etc.) characteristic of javascript-obfuscator output. Obfuscation alone is not proof of malicious intent — some publishers obfuscate for anti-tampering or anti-piracy reasons — but it prevents reliable assessment of the file's runtime behavior, and contextual tracing of the obfuscated code path was not available. No concrete evidence of credential exfiltration, install-time fetch-and-execute, silent-relay of caller data, or hardcoded attacker C2 was observed, but the inability to verify what the obfuscated shim does at load/use time leaves the residual risk unresolved. Recommend human review of the de-obfuscated content before trusting this package in a build pipeline.

Source: ghsa-malware (9eba02cd977686ab88190a2b6adbf6cac674273f223ff2b2da59d6fe94fe3da6)

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": [
        {
            "sha256": "9eba02cd977686ab88190a2b6adbf6cac674273f223ff2b2da59d6fe94fe3da6",
            "id": "GHSA-vrc4-g2p2-9895",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "modified_time": "2026-06-23T15:38:44Z",
            "source": "ghsa-malware",
            "import_time": "2026-06-23T17:03:25.71343293Z"
        },
        {
            "sha256": "8d8956b9f24ef06b1eb1b055b0e2cf3bc6702008feb964f74bd2939902c0fc6b",
            "id": "IN-MAL-2026-007369",
            "source": "amazon-inspector",
            "modified_time": "2026-06-23T21:30:59Z",
            "versions": [
                "1.6.2"
            ],
            "import_time": "2026-06-23T21:37:20.933271045Z"
        },
        {
            "sha256": "91baacbbae3abfb5a5c5c788d08ea925e9bcdf5cfa38f4865994b28f1668e38f",
            "import_time": "2026-06-23T21:37:20.87956849Z",
            "source": "amazon-inspector",
            "modified_time": "2026-06-23T21:30:58Z",
            "versions": [
                "1.6.0"
            ],
            "id": "IN-MAL-2026-007368"
        },
        {
            "sha256": "dc297a0deaba794fdbfccc280a79c7cc895f21fc4e0122b1fba1bc4759b66c3f",
            "import_time": "2026-06-23T21:37:21.014066156Z",
            "source": "amazon-inspector",
            "modified_time": "2026-06-23T21:31:03Z",
            "versions": [
                "1.6.1"
            ],
            "id": "IN-MAL-2026-007370"
        }
    ]
}
References
Credits

Affected packages

npm / sync-external

Package

Name
sync-external
View open source insights on deps.dev
Purl
pkg:npm/sync-external

Affected ranges

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

Affected versions

1.*
1.6.0
1.6.1
1.6.2

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sync-external/MAL-2026-6336.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "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",
        "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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "sha256": "a04ea528a630adb229706c91b08d52ac600f18d7fdca5e22b8b1cbf5c8fe2a79",
            "tlsh": "013390456ac0749123475fbb362bb0d5e42b18d93588844fc19cfea0a8b2767e6f3d39",
            "path": "shim/index.js"
        }
    ]
}