MAL-2026-6350

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-operated/MAL-2026-6350.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6350
Published
2026-06-23T21:50:24Z
Modified
2026-06-23T22:46:24.969986795Z
Summary
Malicious code in chai-as-operated (npm)
Details

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

Source: amazon-inspector (927e5f9d908ce243e10ddf51e2463ac96c6f685790ec9f35dcc7309c90ad8407)

Package name impersonates the widely-used chai-as-promised (README instructs chai.use(chaiAsOperated)) and the README badges further impersonate pino (npm/GitHub Actions shields point at pinojs/pino). On require('chai-as-operated'), index.js exposes a middleware factory that spawns a detached node./lib/initializeCaller.js. That script defines a fake process object containing base64-obfuscated values (DEV_API_KEY decodes to https://amethyst-lorrin-26.tiiny.site/index.json, plus obfuscated x-secret-key header credentials), then performs axios.get(apiEndpoint,...) and executes the response body via new Function.constructor('require', response)(require) with retry logic. The remote payload runs with full Node require access in a detached background process. The destination is a free tiiny.site host — author-mutable, anonymous infrastructure — and the URL is hidden behind base64 to evade casual review and string scanners. This is a classic typosquat + remote-execution dropper.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "6.0.3"
            ],
            "modified_time": "2026-06-23T21:50:24Z",
            "sha256": "927e5f9d908ce243e10ddf51e2463ac96c6f685790ec9f35dcc7309c90ad8407",
            "id": "IN-MAL-2026-007379",
            "source": "amazon-inspector",
            "import_time": "2026-06-23T22:31:27.867166588Z"
        }
    ]
}
References
Credits

Affected packages

npm / chai-as-operated

Package

Name
chai-as-operated
View open source insights on deps.dev
Purl
pkg:npm/chai-as-operated

Affected ranges

Affected versions

6.*
6.0.3

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "chai-as-operated-6.0.3.tgz",
            "hashes": {
                "sha512_sri": "sha512-WMWbFsfn4K50LrwMlDQBNWlaC5PLR9vaDQ+ES7HNAiU7Vqd7BMtU5sbyLIFMj5JlUbCaFX/6ADGSW3gkWu1UJQ==",
                "sha1": "bb070802a72fbb1a56595f4642910afa1ffbdc6b"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "lib/initializeCaller.js",
            "tlsh": "f111008d61fc200c056512e6b22f18116022e4273d4ad4e47adc83470f9627fbd536df",
            "sha256": "2a41c6b7c5e256d70f884c613c6412ef73d86f8cd8a65afe6afb64fabaf4e022"
        },
        {
            "path": "package.json",
            "tlsh": "b3019c60ce788e2300ed25824c2a064376619c139928fc1933db512c0f9d5bf11bf21d",
            "sha256": "f38235eb42aad0173030d67ae67ef047c2accb391012044a3171bd9ff84fbe71"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-operated/MAL-2026-6350.json"