MAL-2026-18451

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/contracts-upgradeable/MAL-2026-18451.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18451
Published
2026-11-02T02:31:07Z
Modified
2026-11-02T06:00:06Z
Summary
Malicious code in contracts-upgradeable (npm)
Details

contracts-upgradeable takes the unscoped name of @openzeppelin/contracts-upgradeable and has no functional code. Its preinstall script runs node preinstall.js on npm install, which POSTs the machine's hostname, the OS username and the local time to the Discord webhook https://canary.discord.com/api/webhooks/1566232728179843243/pM5rDIrCRrEpQRbA7ibaiQk1XOQlIftmBacA5s8jD8NvXn5W-rS832DOWHQS-G-j3N6U as "PC Notifier". It was published on 2026-11-02 by the npm account bigdevin55, which published sol-wallet-adapter 1.0.7 with the same script the same day; the account cutekitten05 used the same webhook in packages published on 2026-11-01.

Database specific 
{
    "iocs":  {
        "files":  [
            {
                "digests":  {
                    "sha256":  "d619f985a0aa87e19f7b87dcdee7a29ebe94fb3cdf62960d9c8425edcf554a0a"
                },
                "note":  "preinstall runs `node preinstall.js`, which POSTs hostname and username to a Discord webhook (contracts-upgradeable@1.0.0).",
                "paths":  [
                    "package.json"
                ],
                "source":  "PACKAGE_ARCHIVE"
            },
            {
                "digests":  {
                    "sha256":  "d2709b8afcf5e5e2859d0b56c8f119b73c98fc56c32fb072baea5b51b1cc3554"
                },
                "note":  "Executed by the preinstall script of contracts-upgradeable@1.0.0.",
                "paths":  [
                    "preinstall.js"
                ],
                "source":  "PACKAGE_ARCHIVE"
            }
        ],
        "urls":  [
            "https://canary.discord.com/api/webhooks/1566232728179843243/pM5rDIrCRrEpQRbA7ibaiQk1XOQlIftmBacA5s8jD8NvXn5W-rS832DOWHQS-G-j3N6U"
        ]
    }
}
References
Credits

Affected packages

npm / contracts-upgradeable

Package

Name
contracts-upgradeable
View open source insights on deps.dev
Purl
pkg:npm/contracts-upgradeable

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/contracts-upgradeable/MAL-2026-18451.json"