MAL-2026-12766

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-plugin-error-boundary/MAL-2026-12766.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12766
Aliases
  • GHSA-2557-fmc3-p2q7
Published
2026-08-05T13:42:10Z
Modified
2026-08-07T00:04:58.608630258Z
Summary
Malicious code in devplatform-spa-plugin-error-boundary (npm)
Details

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

Source: amazon-inspector (282ec333b26c6283eb35916acab1db10c1362d296d0694b1548882c6e48c06be)

The package's main index.js unconditionally requires./ext, which runs at load time and fetches a per-platform binary over HTTPS from string-concatenation-obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev). If HTTPS fails, ext.js falls back to a DNS TXT covert channel under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), querying c.<domain> for a chunk count then 0.<domain>, 1.<domain>,... and base64-decoding the concatenation into a binary. The fetched bytes are written to a randomly-named file in the temp directory (masquerading as.cache<hex>, dotnetdiag<hex>.exe, analyticsstate), chmod'd 0755, and spawned detached via /bin/sh -c or cmd /c start /b. There is no version pinning, hash verification, or publisher-owned CDN, and the package's stated purpose (an SPA error-boundary component) has no legitimate reason to fetch and execute a native binary. Endpoint hostnames are assembled from split array literals at runtime to defeat static string scanning. Loading this package causes arbitrary attacker-controlled code to run on the installer's host.

Source: ghsa-malware (52a6a2f9ca87decad3081725ea4293dce82d4c33a5afe1fdb9774776b95760be)

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": [
                "35.4.6"
            ],
            "import_time": "2026-08-05T14:19:51.695472768Z",
            "sha256": "282ec333b26c6283eb35916acab1db10c1362d296d0694b1548882c6e48c06be",
            "id": "IN-MAL-2026-015004",
            "modified_time": "2026-08-05T13:42:10Z",
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-08-06T23:53:00.663031702Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "id": "GHSA-2557-fmc3-p2q7",
            "sha256": "52a6a2f9ca87decad3081725ea4293dce82d4c33a5afe1fdb9774776b95760be",
            "modified_time": "2026-08-06T16:49:05Z",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-spa-plugin-error-boundary

Package

Name
devplatform-spa-plugin-error-boundary
View open source insights on deps.dev
Purl
pkg:npm/devplatform-spa-plugin-error-boundary

Affected ranges

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

Affected versions

35.*
35.4.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "devplatform-spa-plugin-error-boundary-35.4.6.tgz",
            "hashes": {
                "sha512_sri": "sha512-DEete4A+nzXUMOhH0zcw5K688SynuFizxy7TQkRd3MeA7gBBBgNBi0iVihm06EJ44hstY4RpI+VAeXPOH9Ja+A==",
                "sha1": "eb8f76d8299a9c9789def0a5cb8828c95e816765"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_ext.js",
            "sha256": "889c5b88d2542a70a6dc003330ee04ba46d00a1828228272f28064c716190b73",
            "tlsh": "ddb1b79a156a70198bb0ebf487175419f65bf6633380c2d8fb5ca9881f7316483b1eec"
        }
    ]
}
cwes 
[
    {
        "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.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-plugin-error-boundary/MAL-2026-12766.json"