MAL-2026-12434

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/saas-f-testing/MAL-2026-12434.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12434
Aliases
  • GHSA-fvrj-4h6r-8rcg
Published
2026-08-05T12:26:05Z
Modified
2026-08-21T13:45:10Z
Summary
Malicious code in saas-f-testing (npm)
Details

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

Source: amazon-inspector (9b4a492a289f0cc0ec0f924149b0cd29521c60747d6fe700d84d03ddddcd8a65)

On require, index.js loads setup.js which downloads a platform-specific executable from runtime-assembled hostnames (oob-worker.cf103-07.0.workers.dev and sibling *.workers.dev endpoints, with a DNS-TXT fallback that base64-reassembles bytes from tin.dl.well1.site / tina.dl.well1.site / ldr.dl.well1.site / win.dl.well1.site), writes it to /var/tmp or %TEMP% under cover names such as.cache_,.analytics_state, or dotnet_diag_.exe, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe with no hash or signature verification. Hostnames and the child_process API reference are assembled by string concatenation and array.join to evade static matching. A secondary file lib/telemetry.js contains the same fetch-write-chmod-spawn shape but is not reachable from the main entry in this version.

Source: ghsa-malware (ab410ae25dd07a0ba38a8e8a19f8f16cc56d547f4d25831bc121207767861b63)

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-2026-014654",
            "import_time": "2026-08-05T13:08:34.251376073Z",
            "modified_time": "2026-08-05T12:26:05Z",
            "sha256": "9b4a492a289f0cc0ec0f924149b0cd29521c60747d6fe700d84d03ddddcd8a65",
            "source": "amazon-inspector",
            "versions": [
                "20.4.2"
            ]
        },
        {
            "id": "GHSA-fvrj-4h6r-8rcg",
            "import_time": "2026-08-21T13:32:25.31475407Z",
            "modified_time": "2026-08-21T12:38:11Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "ab410ae25dd07a0ba38a8e8a19f8f16cc56d547f4d25831bc121207767861b63",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / saas-f-testing

Package

Name
saas-f-testing
View open source insights on deps.dev
Purl
pkg:npm/saas-f-testing

Affected ranges

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

Affected versions

20.*
20.4.2

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": "setup.js",
            "sha256": "9a0e487b185d18183c6b052dc83cb0a2f2841ea4ada200056fe0d603b5ac37a1",
            "tlsh": "8ea1a79b16a570188bb097e587178416f65be2632380c290fbaca5985f7712482b2efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "8d97c15cff64631321842fcc0e6c425109cf78a9b3468c73c361c3cfce63773f",
            "tlsh": "82835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity": [
        {
            "filename": "saas-f-testing-20.4.2.tgz",
            "hashes": {
                "sha1": "0570c5c186c94e064566f0bed2c5dd1b937648d8",
                "sha512_sri": "sha512-utlldlmqH5xSnXqIdT2gRIqY+OUFyucRaoXirro5vSJ5OGKOkwCiQalEhTFUDJ6lte4g/SG6KMeumdPAAfWT/g=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/saas-f-testing/MAL-2026-12434.json"