MAL-2026-12415

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/pfp-forms-sme-sitebuilder/MAL-2026-12415.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12415
Aliases
  • GHSA-x4j8-fqq2-qv3q
Published
2026-08-05T12:37:13Z
Modified
2026-08-20T17:30:12Z
Summary
Malicious code in pfp-forms-sme-sitebuilder (npm)
Details

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

Source: amazon-inspector (97f0c2b9f45c8e537bcf70d98c1aa5daa263962eae954c2d871d978e0ac0dd64)

index.js unconditionally requires./support on module load. support.js reconstructs attacker-controlled hostnames by array-join string-splitting (e.g. ["oob-worker.cf102-baf.w","orkers",".d","ev"].join("") and DNS-TXT fallback hosts like tin.dl.well1.site), downloads a platform-specific binary via https.get, writes it to a hidden staging path (/var/tmp/.cache on Unix or %TEMP%/dotnet_diag.exe on Windows) using a masquerade name, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Hostname string-splitting and dynamic reconstruction of API names (e.g. fs["chmod"+"Sync"]) constitute affirmative concealment. A sibling module lib/telemetry.js contains matching write+chmod+spawn dropper primitives with base64 chunk reassembly; it is not wired from index.js in this version but ships as a secondary dropper path. Fetch destinations are non-publisher, unpinned, and unverified; the fetched bytes are executed on the installer host on any require() of the package.

Source: ghsa-malware (ac8c13c6d017268c3f5d2b94aa373d7ac89d02f991a180903af5ce6d3092a148)

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-2026-014731",
            "import_time": "2026-08-05T13:08:41.698960979Z",
            "modified_time": "2026-08-05T12:37:13Z",
            "sha256": "97f0c2b9f45c8e537bcf70d98c1aa5daa263962eae954c2d871d978e0ac0dd64",
            "source": "amazon-inspector",
            "versions": [
                "20.2.1"
            ]
        },
        {
            "id": "GHSA-x4j8-fqq2-qv3q",
            "import_time": "2026-08-20T17:25:01.640826238Z",
            "modified_time": "2026-08-20T16:39:34Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "ac8c13c6d017268c3f5d2b94aa373d7ac89d02f991a180903af5ce6d3092a148",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / pfp-forms-sme-sitebuilder

Package

Name
pfp-forms-sme-sitebuilder
View open source insights on deps.dev
Purl
pkg:npm/pfp-forms-sme-sitebuilder

Affected ranges

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

Affected versions

20.*
20.2.1

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"
    }
]
indicators
{
    "evidence_files": [
        {
            "path": "_support.js",
            "sha256": "1e175be706e981ea5088f54e184a16f1b3ca8aacdbe15755814a12c8f46c1f82",
            "tlsh": "b8a1845a02a570198bb0d7e487174416f76be6a33780c294fbac69945f76224c3b2efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "cfc1c1857bafda7b6a813f2398f9a67d78cad42ff4216dc997fdc99288d4f544",
            "tlsh": "26835055566a202186b2b378df234107ff3685272642429dbafc82dc1fbd72092a5ffd"
        }
    ],
    "package_integrity": [
        {
            "filename": "pfp-forms-sme-sitebuilder-20.2.1.tgz",
            "hashes": {
                "sha1": "033ed0b7cae676028f0b671bbcd89c074f1e9d4f",
                "sha512_sri": "sha512-P3ICI27/RyuZtNmcnpKMk8NL8YVpa0jDavDdbRLu1ttowhVdIwQ4DXl/wCrP1gMpeVyEJteXut2xzFYFF1+Zig=="
            }
        }
    ]
}
source
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/pfp-forms-sme-sitebuilder/MAL-2026-12415.json"