MAL-2026-12827

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/beaver-ui-subheader/MAL-2026-12827.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12827
Aliases
  • GHSA-9cm3-2f62-gm75
Published
2026-08-05T15:04:53Z
Modified
2026-08-06T01:19:49.359048526Z
Summary
Malicious code in beaver-ui-subheader (npm)
Details

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

Source: amazon-inspector (b62336df8b8ee0e1bd3939f4515a4b25dd6741773f30344cd3a0d065d16358fb)

The package advertises itself as a UI subheader component, but index.js requires./support on load and support.js downloads a platform-specific binary from string-concatenated Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, cf102-baf, cf100-416, cf103-070) with a DNS TXT-record fallback that reassembles base64 chunks from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /var/tmp/.cacheXXXX on Unix or %TEMP%/dotnetdiagXXXX.exe on Windows, chmodded to 0755, and spawned detached via /bin/sh -c or cmd. Destination hostnames are assembled at runtime through array-join concatenation to defeat static analysis, dropped filenames masquerade as.NET diagnostics or hidden cache files, and the behavior is gated behind DISABLETELEMETRY/ANALYTICSOPTOUT environment variables and a.analytics_state TTL stamp file to present a telemetry cover story. A UI component library has no legitimate reason to fetch and execute an opaque native binary from anonymous Cloudflare Workers hosts at require time.

Source: ghsa-malware (77c555ecdc70942121beda0c89e556c311f04bc6bc986fdc364ddbb6b07e7f09)

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": [
        {
            "versions": [
                "35.7.2"
            ],
            "import_time": "2026-08-05T15:19:57.987292821Z",
            "sha256": "b62336df8b8ee0e1bd3939f4515a4b25dd6741773f30344cd3a0d065d16358fb",
            "id": "IN-MAL-2026-015560",
            "modified_time": "2026-08-05T15:04:53Z",
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-08-06T00:58:53.336451828Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "id": "GHSA-9cm3-2f62-gm75",
            "sha256": "77c555ecdc70942121beda0c89e556c311f04bc6bc986fdc364ddbb6b07e7f09",
            "modified_time": "2026-08-05T18:03:46Z",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / beaver-ui-subheader

Package

Name
beaver-ui-subheader
View open source insights on deps.dev
Purl
pkg:npm/beaver-ui-subheader

Affected ranges

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

Affected versions

35.*
35.7.2

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-+6ClIWG00IfpRAWRi3ShpNLq5gHG8GGn/1TtSJ0Ci+lZdkDIZmpsw/ILgE/EZQAmW/hSgFGVGjtYJitgAFKtUw==",
                "sha1": "b6c6d6131d60d2dc348d7e71fac5e2d7b85240bf"
            },
            "filename": "beaver-ui-subheader-35.7.2.tgz"
        }
    ],
    "evidence_files": [
        {
            "tlsh": "68a1955b166671188bb0ebe4871b4415f55af6633780c2c4f7ac69941fb313482b2efc",
            "sha256": "1ca4662342185009cf9cafd1a4d585ae1c5a9ecc49e417a6b9bd33b262c6a1f7",
            "path": "_support.js"
        }
    ]
}
cwes 
[
    {
        "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.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/beaver-ui-subheader/MAL-2026-12827.json"