MAL-2026-2528

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sjs-lint-build1/MAL-2026-2528.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-2528
Published
2026-04-09T14:04:30Z
Modified
2026-04-10T17:35:12.516557Z
Summary
Malicious code in sjs-lint-build1 (npm)
Details

sjs-biginteger typosquats big.js on npm. Published April 7, 2026 by throwaway account vanes.s.p.orit.a, the package ships legitimate big.js source and hides its payload in a dependency: sjs-lint-build1. On install, the dependency’s postinstall hook fetches the attacker’s SSH public key from a C2 server, appends it to ~/.ssh/authorized_keys, opens firewall port 22, then collects SSH keys, environment variables, config files (.env, Solana id.json, config.toml), and system fingerprints. It exfiltrates the collected data to two Vercel-hosted C2 domains disguised as Cloudflare services.

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

Source: amazon-inspector (cba6ed57b1eb82592650453ea703d44d9294be1c1c3316f4562ff4f197e6c0f6)

The package sjs-lint-build1 was found to contain malicious code.

Database specific 
{
    "malicious-packages-origins": [
        {
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "sha256": "cba6ed57b1eb82592650453ea703d44d9294be1c1c3316f4562ff4f197e6c0f6",
            "source": "amazon-inspector",
            "modified_time": "2026-04-10T17:02:58Z",
            "import_time": "2026-04-10T17:21:49.017936724Z"
        }
    ]
}
References
Credits

Affected packages

npm / sjs-lint-build1

Package

Name
sjs-lint-build1
View open source insights on deps.dev
Purl
pkg:npm/sjs-lint-build1

Affected ranges

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

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sjs-lint-build1/MAL-2026-2528.json"