MAL-2026-3261

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/internal-auth-provider/MAL-2026-3261.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-3261
Aliases
  • GHSA-w76m-ffcr-5rfm
Published
2026-04-29T14:00:00Z
Modified
2026-05-12T07:57:18.129999Z
Summary
Malicious code in internal-auth-provider (npm)
Details

Dependency confusion and typosquatting campaign by threat actor "saif777". Packages use inflated version numbers (9999.9999.9999, 9999.9999.10000, 50.50.50, 7.66.5) to win version resolution in environments with private registries. All active packages execute a postinstall hook ("node index.js") that collects a system fingerprint — public IP (via api.ipify.org), username, hostname, CPU model, RAM, working directory, OS platform — and exfiltrates it as a Discord embed to a shared webhook (base64-obfuscated in source). Payloads include sandbox/bot detection: machines with ≤1 CPU or <2 GB RAM are flagged as sandbox/CI; real machines trigger a green embed. Targets organisations with a private internal-auth-provider package. The package description self-identifies as a 'security research package for dependency confusion audit', indicating deliberate deception.


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

Source: amazon-inspector (76a6ba942ecf9ea05ab48effb39c99f4fab5f4e605b9acbd71c76d7a2f993318)

The package internal-auth-provider was found to contain malicious code.

Source: ghsa-malware (9b0b45d99f2f9fcef2b68ab24bfa6ca0d37a13f9ca343972df8541a59a0f4358)

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": "9b0b45d99f2f9fcef2b68ab24bfa6ca0d37a13f9ca343972df8541a59a0f4358",
            "id": "GHSA-w76m-ffcr-5rfm",
            "import_time": "2026-05-05T15:54:22.838503893Z",
            "modified_time": "2026-05-05T15:33:36Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "source": "ghsa-malware"
        },
        {
            "sha256": "76a6ba942ecf9ea05ab48effb39c99f4fab5f4e605b9acbd71c76d7a2f993318",
            "versions": [
                "50.50.50"
            ],
            "import_time": "2026-05-12T07:28:54.16730166Z",
            "modified_time": "2026-05-12T06:53:21Z",
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / internal-auth-provider

Package

Name
internal-auth-provider
View open source insights on deps.dev
Purl
pkg:npm/internal-auth-provider

Affected ranges

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

Affected versions

50.*
50.50.50

Database specific

cwes
[
    {
        "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/internal-auth-provider/MAL-2026-3261.json"