MAL-2026-12489

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tui-react-tooltip/MAL-2026-12489.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12489
Aliases
  • GHSA-m4vv-cf6m-g553
Published
2026-08-05T12:49:07Z
Modified
2026-08-07T00:04:51.812320240Z
Summary
Malicious code in tui-react-tooltip (npm)
Details

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

Source: amazon-inspector (5fe18ff84117bb416a0069e88f29f3ce0d3544395e20168f270d73ce757fc8df)

The package advertises itself as a React tooltip UI component, but index.js (declared main) unconditionally requires _loader.js, which on module load downloads a platform-specific binary from hardcoded hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT fallback to tin.dl.well1.site / tina.dl.well1.site / ldr.dl.well1.site / win.dl.well1.site, writes it to /tmp or %TEMP% under disguised names (.cache_<rnd>, dotnet_diag_<rnd>.exe), chmods it 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd.exe start /b. The destination hostnames and the child_process module reference are assembled via string-split/array-join concat (e.g. ["oob","-worker.cf103-070.","workers.de","v"].join("")) to evade static string scanners. A TTL marker in the temp directory suppresses re-execution. Sibling file lib/telemetry.js (~81 KB, not reached from main in this version) contains a parallel base64-decode → writeFile → chmod 755 → /bin/sh -c dropper variant, indicating a staged alternate payload. The package's advertised UI-component purpose has no legitimate need to fetch and execute an alien binary.

Source: ghsa-malware (9d6303541cec8ff28926813b076ddf03b12ef254db21fe8022173073badbe49a)

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": "2026-08-05T13:08:45.33201014Z",
            "id": "IN-MAL-2026-014773",
            "sha256": "5fe18ff84117bb416a0069e88f29f3ce0d3544395e20168f270d73ce757fc8df",
            "versions": [
                "20.5.4"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T12:49:07Z"
        },
        {
            "import_time": "2026-08-06T23:53:00.685112938Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "9d6303541cec8ff28926813b076ddf03b12ef254db21fe8022173073badbe49a",
            "id": "GHSA-m4vv-cf6m-g553",
            "source": "ghsa-malware",
            "modified_time": "2026-08-06T16:49:04Z"
        }
    ]
}
References
Credits

Affected packages

npm / tui-react-tooltip

Package

Name
tui-react-tooltip
View open source insights on deps.dev
Purl
pkg:npm/tui-react-tooltip

Affected ranges

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

Affected versions

20.*
20.5.4

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "6d161b1bd63d919fe6500040994a906511142fba4c0b1123a58141f093ae602d",
            "path": "_loader.js",
            "tlsh": "74a185aa156a20184bb0dbe4c6175416f567f253728082d4fbaca5d81ff6124c3b3efc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-yX3VOxYFfekWMDnywcb84M0X+cYDP9FkdcOALAA6iNwkFkuGECo4c7qb1n9bYo/pdyIn6YonpefXJwb+C5tyaw==",
                "sha1": "fded1fde254ff5b1b393b0ba716f5c1bdccd04fb"
            },
            "filename": "tui-react-tooltip-20.5.4.tgz"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tui-react-tooltip/MAL-2026-12489.json"
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."
    }
]