MAL-2026-12740

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-react-rest-client/MAL-2026-12740.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12740
Aliases
  • GHSA-4j95-vr6c-r5xm
Published
2026-08-05T13:46:34Z
Modified
2026-08-06T01:20:32.930483446Z
Summary
Malicious code in devplatform-react-rest-client (npm)
Details

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

Source: amazon-inspector (755ebe99a58cc94ddd8953897d01f30fcbacd145f6acf635761cf08b33d4868c)

On require of this package, index.js loads ext.js, which fetches a platform-specific binary from a rotating list of Cloudflare workers.dev hosts assembled at runtime via array.join to defeat static string scanning (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked fallback channel via *.dl.wel1.ru (sdk, ext, pkg, net). The fetched binary is written to /tmp or %TEMP% under a cover-story name impersonating.NET diagnostics tooling (dotnetdiag<hex>.exe on Windows,.cache<hex> on POSIX), chmod 0755 on POSIX, and spawned detached via /bin/sh -c or cmd.exe. Any consumer that requires the package on install/import receives arbitrary attacker-controlled code execution on the host.

Source: ghsa-malware (26008a5d95840ff404c5a75362ed3d81eedbd8989fcd37a6c40441421a96dc29)

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": [
        {
            "versions": [
                "35.4.8"
            ],
            "id": "IN-MAL-2026-015034",
            "import_time": "2026-08-05T14:19:54.842721942Z",
            "modified_time": "2026-08-05T13:46:34Z",
            "source": "amazon-inspector",
            "sha256": "755ebe99a58cc94ddd8953897d01f30fcbacd145f6acf635761cf08b33d4868c"
        },
        {
            "modified_time": "2026-08-05T15:01:23Z",
            "id": "GHSA-4j95-vr6c-r5xm",
            "import_time": "2026-08-06T00:58:53.280739929Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "ghsa-malware",
            "sha256": "26008a5d95840ff404c5a75362ed3d81eedbd8989fcd37a6c40441421a96dc29"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-react-rest-client

Package

Name
devplatform-react-rest-client
View open source insights on deps.dev
Purl
pkg:npm/devplatform-react-rest-client

Affected ranges

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

Affected versions

35.*
35.4.8

Database specific

cwes 
[
    {
        "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."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-react-rest-client/MAL-2026-12740.json"
indicators 
{
    "package_integrity": [
        {
            "filename": "devplatform-react-rest-client-35.4.8.tgz",
            "hashes": {
                "sha512_sri": "sha512-G8gOclCzlnEMmEuS4hXsY6tldHlijo2ZFTZ3Z0Py9RjlcSlnp4d6Ns33harud4lZ0sLdvmpVwiotXz0vpxJrEw==",
                "sha1": "d16208fdf78e6822dbe1f8ea0e8438d8ce5359d5"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_ext.js",
            "tlsh": "afa1a65601a970098bb0d7e4cb17541af65bf6633380c298fb5ca9981f7612483b1efc",
            "sha256": "3e4428852bd226d7b0a300192520022e915006610cf2e77758f9853afd782ab0"
        }
    ]
}