MAL-2026-5343

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/progerss-cli/MAL-2026-5343.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5343
Aliases
  • GHSA-pr99-g8pf-f3rr
Published
2026-06-09T15:10:13Z
Modified
2026-06-09T15:31:29.348913199Z
Summary
Malicious code in progerss-cli (npm)
Details

progerss-cli is a typosquat of the popular cli-progress package that ships an obfuscated payload executed automatically on install.

The package borrows trust from its victim: repository.url is set to https://github.com/npkgz/cli-progress — the legitimate cli-progress project's own repository — and the author field is set to andidittrich (the real maintainer).

package.json defines scripts.postinstall: node build-helper.js, and declares form-data as its only runtime dependency (used for exfiltration).

build-helper.js (load gate): polls up to 31 times at 1.5 s intervals for form-data to resolve (require.resolve('form-data')), then require('./index.js'). This delays payload execution until the exfiltration dependency is fully installed, evading naive install-time analysis that runs before dependencies settle.

index.js: a ~273 KB obfuscated payload that performs data collection and form-data-based HTTP exfiltration.

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

Source: ghsa-malware (7fde91dd01fb8e69b5fcf0130d7fc0e5d08b1820413452ed0d72ce42d06e6dab)

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": [
        {
            "import_time": "2026-06-09T15:22:39.85050424Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "7fde91dd01fb8e69b5fcf0130d7fc0e5d08b1820413452ed0d72ce42d06e6dab",
            "id": "GHSA-pr99-g8pf-f3rr",
            "source": "ghsa-malware",
            "modified_time": "2026-06-09T15:10:14Z"
        }
    ]
}
References
Credits

Affected packages

npm / progerss-cli

Package

Name
progerss-cli
View open source insights on deps.dev
Purl
pkg:npm/progerss-cli

Affected ranges

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

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/progerss-cli/MAL-2026-5343.json"
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]