Malicious code in @selfpentest/eslint-pentest-plugin (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 (f338876601180482b20a42fbd799b9d4e1b059bf7d733b5db448f7fc6d3455ff) Package presents itself as an ESLint plugin but the exported plugin object is an empty shell. index.js unconditionally invokes a steal() routine at top level, so any require() of the package (including ESLint auto-loading the plugin) triggers the payload. The payload reads process.env.HOME and process.env.SECRET, reads the first 30 bytes of ~/.ssh/known_hosts via fs.readFileSync(path.join(os.homedir(), '/.ssh/known_hosts')), and issues an HTTP GET to http://localhost:1337/eslint with the collected values as URL query parameters. The package.json description and README state that the package 'pretends to be an eslint plugin but it steals secrets instead' and identify it as a supply-chain-attack demonstration. The exfiltration destination is loopback (127.0.0.1:1337), so bytes do not leave the host unless a local listener collects them, but the credential-read code path executes on every require of the package.

Source published

29 Sep 2026 22:12:19 UTC

Source modified

29 Sep 2026 22:31:17 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.