MAL-2026-14201

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chaikit/MAL-2026-14201.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14201
Aliases
  • GHSA-6c2m-985r-wrwm
Published
2026-08-19T01:59:26Z
Modified
2026-09-28T16:45:40Z
Summary
Malicious code in chaikit (npm)
Details

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

Source: amazon-inspector (a4711ba83393e8da11ab4368f9b38dac3de00bc523946cc27e4e47f38a51b9c4)

The package's main entry (index.js) unconditionally requires./lib/config, a ~4MB obfuscator.io-style file (RC4 string-array decoder with ~23,902 entries, hex-encoded property names) whose top-level IIFE self-executes on load. Any consumer that imports chaikit runs this opaque code in their process. The advertised middleware in index.js is a trivial next() passthrough, so the obfuscated blob is the only substantive behavior of the package. package.json bundles axios as a runtime dependency, giving the opaque code a network egress channel. The README impersonates the pino logger (pino badges, pinojs/pino links, chai/chai-kit usage snippet), while the package.json description is unrelated boilerplate ('management of vulnerabilities') and file.js references a nonexistent./pino module — cover-story metadata consistent with a package published to be resolved by developers searching for chai or pino tooling. The combination of import-time execution of a large opaque blob, a mismatched cover story, and a bundled HTTP client is the canonical loader shape of an installer-harm supply-chain payload.

Source: ghsa-malware (c8ef67981413b5e78e398269cd9cb77c6cb1e9f52b60af03113538581e11c225)

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-2026-018287",
            "import_time":  "2026-08-19T02:31:08.434609818Z",
            "modified_time":  "2026-08-19T01:59:26Z",
            "sha256":  "a4711ba83393e8da11ab4368f9b38dac3de00bc523946cc27e4e47f38a51b9c4",
            "source":  "amazon-inspector",
            "versions":  [
                "2.3.5"
            ]
        },
        {
            "id":  "GHSA-6c2m-985r-wrwm",
            "import_time":  "2026-09-28T16:31:02.112787832Z",
            "modified_time":  "2026-09-28T15:54:12Z",
            "ranges":  [
                {
                    "events":  [
                        {
                            "introduced":  "0"
                        }
                    ],
                    "type":  "SEMVER"
                }
            ],
            "sha256":  "c8ef67981413b5e78e398269cd9cb77c6cb1e9f52b60af03113538581e11c225",
            "source":  "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / chaikit

Package

Name
chaikit
View open source insights on deps.dev
Purl
pkg:npm/chaikit

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":  "88d8da1b1148a07973cd1ec96d1f67d4f672b83635ec342783c1df6e38a4ad0c",
            "tlsh":  "e81674cc6688e423c1cc2b93be0539abf17a686294c8a167df557d5db8bc40bc1a4fd4"
        },
        {
            "path":  "index.js",
            "sha256":  "4e6c4e61a7019ab0affe9c2d20e36701b330ec357be205930355bac1464f9316",
            "tlsh":  "0421149124d560ce9938dac0f6306115acdbc677260752b3bdfc97c927860080161fba"
        },
        {
            "path":  "package.json",
            "sha256":  "6cea40708f1d8e795b580d4f171644e15cd1ce21594cb7dc05189030b0ec8e75",
            "tlsh":  "b6017b20da784e2301ed25524c2a06437a654c575528fc2932db512d0f9d5fb05bf21d"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "chaikit-2.3.5.tgz",
            "hashes":  {
                "sha1":  "b6114010391367e1ef7edb2fd031f3ee67e4b58e",
                "sha512_sri":  "sha512-gN+9azR+KKHGISKTJD2gYZEf28tubkMgeH/2UKVUcnVxWQzVp11hC/uZEPFICdBsTJJpsnY9i1yRweEZrUhbEg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chaikit/MAL-2026-14201.json"