MAL-2026-4389

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@flipbit2-bb/test-auth-state/MAL-2026-4389.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4389
Aliases
  • GHSA-jrpc-qv6v-wmr6
Published
2026-05-20T02:09:32Z
Modified
2026-06-29T17:31:42.711214101Z
Summary
Malicious code in @flipbit2-bb/test-auth-state (npm)
Details

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

Source: amazon-inspector (52ba26e89d1aca1f10772bf4cc8c9b23a436a39a8442fdf4ba9abf6c4c890e63)

On npm install, a postinstall script (phone-home.js) collects os.hostname(), os.userInfo().username, process.platform + os.release(), a timestamp, and a package label, then issues an HTTPS GET to https://webhook.site/a536b433-b440-43ec-8399-26059196216e. The package is published under @flipbit2-bb/test-auth-state but the bundled tarball, README, and the phone-home payload's v field all identify as @atlassiansox/cross-flow-support@99.99.99 — a dependency-confusion targeting of Atlassian's internal scope, with version 99.99.99 chosen to win internal-vs-public resolution. Any installer who pulls this package — not just the intended target — leaks host identifiers to the author's webhook.site endpoint. The package has no other functionality.

Source: ghsa-malware (fe83d381e757b0c4f94680f9e22562efc3a173ace04469cbd2b093079faca3d1)

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": [
                "0.0.2"
            ],
            "sha256": "52ba26e89d1aca1f10772bf4cc8c9b23a436a39a8442fdf4ba9abf6c4c890e63",
            "modified_time": "2026-05-20T02:09:32Z",
            "source": "amazon-inspector",
            "import_time": "2026-05-26T05:50:33.781123824Z",
            "id": "IN-MAL-2026-003395"
        },
        {
            "versions": [
                "0.0.2"
            ],
            "sha256": "f5b20d9f984339db71670891222b3ac823f16fc30dca773e09a111b0b3fed8fa",
            "source": "amazon-inspector",
            "modified_time": "2026-05-20T02:09:32Z",
            "import_time": "2026-05-26T05:50:33.877725996Z",
            "id": "IN-MAL-2026-003396"
        },
        {
            "sha256": "fe83d381e757b0c4f94680f9e22562efc3a173ace04469cbd2b093079faca3d1",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "modified_time": "2026-06-29T16:38:11Z",
            "source": "ghsa-malware",
            "import_time": "2026-06-29T17:14:01.286492355Z",
            "id": "GHSA-jrpc-qv6v-wmr6"
        }
    ]
}
References
Credits

Affected packages

npm / @flipbit2-bb/test-auth-state

Package

Name
@flipbit2-bb/test-auth-state
View open source insights on deps.dev
Purl
pkg:npm/%40flipbit2-bb%2Ftest-auth-state

Affected ranges

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

Affected versions

0.*
0.0.2

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "test-auth-state-0.0.2.tgz",
            "hashes": {
                "sha512_sri": "sha512-CcKRZ1NHRpXpnskD6XW8u/Ym+obsnzW6WT6LoPtiJNQfLNg9D2/K9eOKem233X06SSE0dlwgn9sS/wgFt6BoGw==",
                "sha1": "736404baf3cc2a4f9cf3c123b5cb1437abfbd233"
            }
        }
    ],
    "evidence_files": [
        {
            "sha256": "bb3a363aaff81a01b9609fee2a357f03d77cc3fc256eda6305c3bbd5bb1a76da",
            "path": "phone-home.js",
            "tlsh": "230156e437f59578149d50d0b7663f0be257e6083149f4d0ecad538482c50f026b1676"
        },
        {
            "sha256": "89c061e3c0ac9f28052f0e03e7346c2e76ad001c0ec62272dde1bea533bb069c",
            "path": "package.json",
            "tlsh": "c5f08128a614073725c9571829667513b12dceeb130ddc0423d71204039e7f7473a18d"
        }
    ],
    "domains": [
        "webhook.site"
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@flipbit2-bb/test-auth-state/MAL-2026-4389.json"
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]