Malicious code in tiny-viewport-unit-calc (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 (34c221d8f8f0fedded27bfc22763912ffd96e9f3d1b2c08932e054ed418f493e) The package ships thunderboltRegistry.js, a module that imports Node's child_process primitives and executes `whoami` plus repeated `ping` commands against external hostnames, with POST calls present in the same file. The pattern (whoami capture + repeated ping-based beacons + outbound POSTs) is host-reconnaissance and DNS/ICMP-channel exfiltration shape, directed from the installer's machine to an external endpoint. The behavior is unrelated to the package's advertised purpose (a trivial viewport-unit calculator) and provides no functionality to a consumer; its only effect is to leak host identity information off-host when the module is loaded or invoked.

Source published

4 Oct 2026 23:26:23 UTC

Source modified

4 Oct 2026 23:45:21 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

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.