Malicious code in @hrmony/hyper-json-builder (npm)

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (d8139053048172994cadd0251ef74e5104c489dcb4f0448153ea9342b3feb707) On module load, index.js performs top-level fetch to a hardcoded attacker-controlled endpoint at https://hrnmn.dd.h4x.tv/save_instance_info_from_pkge_hrmony_hyper-json-builder and triggers two credential-harvest routines. The first enumerates all entries of process.env and recursively reads /var/run/secrets/ (Kubernetes service-account tokens and mounted secrets), then POSTs the combined payload to that endpoint. The second obtains an IMDSv2 token against 169.254.169.254, queries EC2 instance metadata paths including identity-credentials/ec2/security-credentials and iam/security-credentials/<role>, and POSTs the retrieved IAM role credentials to the same endpoint. The destination path embeds this package's own name, indicating targeted exfiltration keyed to installations of this package. The package.json also declares an unpinned dependency @hrmony/kit-5 ^1.0.0 under the same scope that is not imported by the shipped code. ## Source: ghsa-malware (08fe204e5637fe696905f683edb7cba0c44df4ca14cbd809b3884f149d5dd90a) 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.

Source published

29 Sep 2026 17:22:02 UTC

Source modified

29 Sep 2026 17:45:09 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

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