Vulnerability-Lookup

MAL-2026-15818

Vulnerability from ossf_malicious_packages

Published

2026-09-02 03:58

Modified

2026-09-02 03:58

Summary

Malicious code in vitest-cli-pro (npm)

Details

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

Source: amazon-inspector (1262dc722ebac3b91301efde91e61df9ec9f65ccf91e51c15da53f9b518878b2)

Package published as vitest-cli-pro ships a verbatim copy of nodemailer as cover; its declared postinstall runs lib/utils/index.js, which detaches a child Node process to execute lib/utils/smtp-connection/index.js. That file performs an HTTPS GET to https://api.jsonbin.io/v3/b/6a62bc86da38895dfe879659 and passes the returned record.cookie value to new Function(require) for immediate execution. The JSON bin is attacker-controlled and mutable, so arbitrary JavaScript runs on any machine executing npm install vitest-cli-pro, under the installer's user account. The nodemailer main and the vitest-branded name serve as a cover story for the dropper.

CWE

CWE-506 - The product contains code that appears to be malicious in nature.

Credits

Amazon Inspector inspector-research@amazon.com

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          }
        ],
        "indicators": {
          "evidence_files": [
            {
              "path": "lib/utils/smtp-connection/index.js",
              "sha256": "e96ebeb43c6f0eda1f353dbeed62ab183db5922adcc6a0f95c4f7521b6535f3a",
              "tlsh": "0dd0a78432a6656e21fa2585562620095053c6304d48f052b18467f11c504da6e61bf1"
            },
            {
              "path": "package.json",
              "sha256": "8f91eeb10dabdf03252690318ad0db3d54d251c964bcd2921300ca6ceeb9bb1e",
              "tlsh": "71418515cd678ce3369929ed68685183a460d00fcd0ab81d735c928c4f8e99f32b866d"
            }
          ],
          "package_integrity": [
            {
              "filename": "vitest-cli-pro-10.0.7.tgz",
              "hashes": {
                "sha1": "6c24cf1d7d0c5b447dd66ac34fc06e510562f278",
                "sha512_sri": "sha512-U/M3O3fM07/9te6I+cQ/gllqeZHorV5oYZYQLErVYaDk0Y227C5Os756NprgSgpQufZ3dEHbsFbMH0etKYRDsQ=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "vitest-cli-pro"
      },
      "versions": [
        "10.0.7"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-019332",
        "import_time": "2026-09-02T04:23:33.740461563Z",
        "modified_time": "2026-09-02T03:58:15Z",
        "sha256": "1262dc722ebac3b91301efde91e61df9ec9f65ccf91e51c15da53f9b518878b2",
        "source": "amazon-inspector",
        "versions": [
          "10.0.7"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (1262dc722ebac3b91301efde91e61df9ec9f65ccf91e51c15da53f9b518878b2)\nPackage published as vitest-cli-pro ships a verbatim copy of nodemailer as cover; its declared postinstall runs lib/utils/index.js, which detaches a child Node process to execute lib/utils/smtp-connection/index.js. That file performs an HTTPS GET to https://api.jsonbin.io/v3/b/6a62bc86da38895dfe879659 and passes the returned `record.cookie` value to `new Function(require)` for immediate execution. The JSON bin is attacker-controlled and mutable, so arbitrary JavaScript runs on any machine executing `npm install vitest-cli-pro`, under the installer\u0027s user account. The nodemailer main and the vitest-branded name serve as a cover story for the dropper.\n",
  "id": "MAL-2026-15818",
  "modified": "2026-09-02T03:58:15Z",
  "published": "2026-09-02T03:58:15Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/vitest-cli-pro/v/10.0.7"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in vitest-cli-pro (npm)"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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