MAL-2026-12370

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eslint-plugin-vitest-ts/MAL-2026-12370.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12370
Aliases
  • GHSA-pw3r-jw68-935v
Published
2026-08-05T12:33:24Z
Modified
2026-08-06T01:21:01.809720507Z
Summary
Malicious code in eslint-plugin-vitest-ts (npm)
Details

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

Source: amazon-inspector (a354edd3ce58afcb537f1e58b5152244cc6a98c6b0462de297262d9aba4e17d3)

The package declares itself as an ESLint plugin but ships copies of nodemailer's source layout along with an obfuscated install-time loader. package.json's postinstall hook runs node lib/utils/index.js, which spawns a detached child process executing lib/utils/smtp-connection/index.js. That file uses obfuscator.io-style string-array indirection (_0x438c, _0x926305, etc.) to hide a call that fetches JSON from https://api.jsonbin.io/v3/b/6a72aa2bda38895dfebb1302 and passes the returned record.cookie string to new Function('require', <fetched>)(require). The fetched content is attacker-controlled and mutable, and it executes in-process with require injected, giving arbitrary code execution on any machine that runs npm install for this package. The name eslint-plugin-vitest-ts is unrelated to the shipped nodemailer-shaped source, indicating a lure/typosquat.

Source: ghsa-malware (24c2db5f1e6400e1a774b0a542c8cb8cd6aad001e80068c6aeb97ebc6af3c2d0)

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": [
        {
            "import_time": "2026-08-05T13:08:39.256613578Z",
            "modified_time": "2026-08-05T12:33:24Z",
            "sha256": "a354edd3ce58afcb537f1e58b5152244cc6a98c6b0462de297262d9aba4e17d3",
            "id": "IN-MAL-2026-014704",
            "versions": [
                "1.0.4"
            ],
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-08-06T00:58:53.431398974Z",
            "sha256": "24c2db5f1e6400e1a774b0a542c8cb8cd6aad001e80068c6aeb97ebc6af3c2d0",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-pw3r-jw68-935v",
            "modified_time": "2026-08-05T22:32:26Z",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / eslint-plugin-vitest-ts

Package

Name
eslint-plugin-vitest-ts
View open source insights on deps.dev
Purl
pkg:npm/eslint-plugin-vitest-ts

Affected ranges

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

Affected versions

1.*
1.0.4

Database specific

cwes 
[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-zluxzdxgM/WSkCST3yCxVCkMRwyT0D7u0ajSIBcYq0rjG1SeQU3Y/DN3CDl25RZvOlajMAF1ABL92wMom3zD1g==",
                "sha1": "944387f1b05fdee3111fdc7396153b8a9c9d83b7"
            },
            "filename": "eslint-plugin-vitest-ts-1.0.4.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "lib/utils/smtp-connection/index.js",
            "sha256": "ca9bfbf76c9e252afae19d38daa1fd84fe8fb36c7846f31d0a15e891b7e36e07",
            "tlsh": "ba3131973ad136143352cbeb6e3710eee10bc8213ad99443d184b6dd3c8a820e4eea35"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eslint-plugin-vitest-ts/MAL-2026-12370.json"