MAL-2026-14371

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-testkit/MAL-2026-14371.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14371
Aliases
  • GHSA-wg38-qj68-8g87
Published
2026-08-23T03:14:40Z
Modified
2026-09-09T16:45:04Z
Summary
Malicious code in chai-as-testkit (npm)
Details

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

Source: amazon-inspector (0bf8ab4a811449bd1ba40c637a0eebc0569994d3a3550cf7156c36192abcec31)

The package is published as 'chai-as-testkit' with a description referencing vulnerability management, but the tarball ships pino's README, docs/, index.d.ts, and lib/ tree (proto, levels, transport, worker, redaction) under an unrelated author (Robert King hello@jsonspack.com, bugs.url jsonspack.com) rather than the real pinojs publisher. The shipped index.js is a synthetic stub whose only effect is const config = require('./lib/config'), and lib/config.js is a 4,083,409-byte single-line obfuscator.io-style bundle: a rotated hex-escaped string array of ~23,953 entries with control-flow flattening and dead-code layers (webcrack inlines 40,105 decoded strings across the decoder layers before failing to serialize). This blob runs immediately when any consumer imports the package, executing attacker-controlled code inside the developer or CI Node.js process. The pino impersonation is the social-engineering wrapper around an on-import loader; the shape (name/description/author mismatch + hollow main entry that delegates to a multi-megabyte obfuscated module at require time) is a typosquat-delivered install/import-time RCE vehicle rather than a logging library.

Source: ghsa-malware (95d5d039dd1913413212411db396e7f1124bf58910447548638c505a05a0e21a)

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": [
        {
            "id": "IN-MAL-2026-018569",
            "import_time": "2026-08-23T03:25:56.212228176Z",
            "modified_time": "2026-08-23T03:14:40Z",
            "sha256": "0bf8ab4a811449bd1ba40c637a0eebc0569994d3a3550cf7156c36192abcec31",
            "source": "amazon-inspector",
            "versions": [
                "2.3.5"
            ]
        },
        {
            "id": "GHSA-wg38-qj68-8g87",
            "import_time": "2026-09-09T16:28:44.884884566Z",
            "modified_time": "2026-09-09T15:26:21Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "95d5d039dd1913413212411db396e7f1124bf58910447548638c505a05a0e21a",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / chai-as-testkit

Package

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

Affected ranges

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

Affected versions

2.*
2.3.5

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/config.js",
            "sha256": "ef7a5abedd9be15b8f63cd56aca72913f2858678bcd4148b96030b304e7ca5e4",
            "tlsh": "861672889581c43395ce16a3ff2d6ae8f13a79f1c4c8a54bc569bc9c2dac91fd1a0dd0"
        },
        {
            "path": "package.json",
            "sha256": "9d9df1481c920ec1d01c8cead724dd2ed789c26a411fabee68cd33a6f4414219",
            "tlsh": "51017b20debc4e2301ed25524c2a0643ba614c175628fd1932db512d0f9d5ff41bf21d"
        }
    ],
    "package_integrity": [
        {
            "filename": "chai-as-testkit-2.3.5.tgz",
            "hashes": {
                "sha1": "3fde83408d21f4123e9127ed9dc0aaaf1f603dff",
                "sha512_sri": "sha512-cBCciGdISfMyeKC4gwgCu2c9ciADdt+vwq/Wz56V9rL2Tnvx5Q2FNWk7jDLhGLGMxAdd6d+h3sRtqOMfBr9ghg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-testkit/MAL-2026-14371.json"