Malicious code in @galicia-toolkit/tag-manager (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.

@galicia-toolkit/tag-manager claims the `@galicia-toolkit` scope and describes itself as a dependency-confusion PoC. Its postinstall hook runs `node postinstall.js || true` on npm install; the script collects host, platform, runtime, network, and environment data, then sends it over HTTP to `oob.s4yhii.com:9999` and encodes hostname, username, platform, and architecture in DNS queries to subdomains of `oob.s4yhii.com`. The npm account s4yhii_ published versions 999.0.3 and 999.0.5 on 2026-10-08; 999.0.6 runs the same `node postinstall.js || true` command on install, sends the same DNS queries, and connects to `66.94.100.203:9999`. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (5e2accc91beaa067ef442b5dbedf2fb823cea321757875bff9f4cad10532c093) @galicia-toolkit/[email protected] is a scoped dependency-confusion squat whose entire payload runs from a postinstall hook. On npm install, postinstall.js reads a curated list of credential-grade environment variables (AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN, GITHUB_TOKEN, NPM_TOKEN, NODE_AUTH_TOKEN, ACTIONS_ID_TOKEN_REQUEST_TOKEN), enumerates the full process.env key list, and collects host reconnaissance (hostname, username, platform, arch, kernel, cwd, uid, external IPs, CPU/memory). The collected data is exfiltrated over two channels to a hardcoded external host: an HTTP POST to oob.s4yhii.com:9999/dep-confusion, and DNS beacons encoding hostname/username under *.dc.oob.s4yhii.com. index.js is empty — the package has no library functionality; its only effect is the install-time exfiltration. The package.json uses an inflated 999.0.6 version consistent with winning resolution against an internal @galicia-toolkit scope. A self-label as a bug-bounty PoC in the description does not change the behavior: any installer that resolves this scoped name has its cloud and CI credentials sent to a non-first-party host. ## Source: ghsa-malware (2ad7348fe8e55e4f3f4a46ff9c190cb6b4cca4aba9870af85feeec4e4ee3acaa) 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

8 Oct 2026 15:19:15 UTC

Source modified

12 Oct 2026 06:00:06 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.