MAL-2026-16293

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-indexed/MAL-2026-16293.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16293
Published
2026-09-18T20:25:47Z
Modified
2026-10-08T04:00:04Z
Summary
Malicious code in chai-as-indexed (npm)
Details

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

Source: amazon-inspector (6bd158a05893a55a82bee4867772aefbfb3199a443c38e7161db1a71d47ced86)

chai-as-indexed presents itself as a pino-compatible logger (package.json keywords fast/logger/stream/json, exports module.exports.pino, lib/* filenames mirror pino) but the exported middleware's only real action is to spawn a detached Node child that runs lib/caller.js. lib/caller.js hides its C2 behind a fake local process.env object whose values are base64 literals (DEV_API_KEY, DEV_SECRET_KEY, DEV_SECRET_VALUE); at runtime they decode to the URL https://tomato-erminie-2.tiiny.site/index.json and a request header. The decoded URL is fetched and the JSON response's cookie field is passed to new Function.constructor('require', response)(require), executing attacker-controlled JavaScript with the host process's full Node privileges and require handed in. The destination is an anonymous, author-mutable tiiny.site host with no pinning or integrity check. Any application that requires this package expecting pino and invokes the middleware will fetch and execute whatever the attacker is currently serving.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-020191",
            "import_time": "2026-09-18T20:38:14.059880859Z",
            "modified_time": "2026-09-18T20:25:47Z",
            "sha256": "424ebdaa04d4f7e8ce306f536421ac65d79467e73b05877caac6b72071bdaef9",
            "source": "amazon-inspector",
            "versions": [
                "7.2.8"
            ]
        },
        {
            "id": "IN-MAL-2026-021118",
            "import_time": "2026-10-08T03:50:29.086797557Z",
            "modified_time": "2026-10-08T03:38:40Z",
            "sha256": "6bd158a05893a55a82bee4867772aefbfb3199a443c38e7161db1a71d47ced86",
            "source": "amazon-inspector",
            "versions": [
                "6.0.5"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / chai-as-indexed

Package

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

Affected ranges

Affected versions

6.*
6.0.5
7.*
7.2.8

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "lib/initializeCaller.js",
            "sha256": "e384bffa5e90fb424deb80e2d4f1edf3984f7372cd38943eb63812055b807d93",
            "tlsh": "6af0819d34ba223a42ad64f2b61714551113f42137d5d456f3cd42650f4dd4c6771bc8"
        }
    ],
    "package_integrity": [
        {
            "filename": "chai-as-indexed-7.2.8.tgz",
            "hashes": {
                "sha1": "3057a544492379e40ad2761e503492c2623e148a",
                "sha512_sri": "sha512-GJYoViTyWpM0lQTPUBwq5kTrBb4fwVUammsiZdLX/V69R4TsuG8UoXNgQNDp5PIhWrSHZgWgUZq1ngGvRi1lAg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-indexed/MAL-2026-16293.json"