# MAL-2026-5351: Malicious code in @demica/shared (npm)


- **Type:** Malicious package
- **Package:** `@demica/shared` (npm)
- **Published:** 9 Jun 2026
- **Also known as:** GHSA-h89w-h537-fmq5

## What is MAL-2026-5351?

MAL-2026-5351 is a malicious package in @demica/shared, published on 9 Jun 2026. 

### Official description

**Note:** *This report is updated by a verification record*

Dep-confusion squat of internal @demica/shared at sentinel high version 99.99.100 + auto-exec postinstall (canary.js) beaconing to RAW IP 157.230.17.236:80/dc. Sentinel-high-version + auto-exec beacon = MALICIOUS per operator policy (c913); "authorized canary" framing does NOT downgrade, raw-IP dest matches masterkrweb. 6-pkg @demica canary campaign.

On install, the package's postinstall hook (`node canary.js postinstall` per package.json) issues an unconditional HTTP GET to bare IP 157.230.17.236:80 at path `/dc` with query params containing the package name, version, a nonce, and the lifecycle phase. No environment variables, filesystem contents, or credentials are read or transmitted; the payload is limited to package metadata. The README describes this as an authorized dependency-confusion canary against the @demica scope. The fact-of-install ping is otherwise benign, but it performs unconsented outbound network at install time, the destination is a bare IP over cleartext HTTP with no authentication or pinning, and the same postinstall hook is a position from which a future republish could deliver arbitrary payloads. Routing to human review so the @demica organization can confirm the canary is theirs and that the destination IP is operator-controlled.

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.

## What should I do about MAL-2026-5351?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-5351 is a malicious package: @demica/shared (npm). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-5351/ (Markdown: https://insights.sbomify.com/MAL-2026-5351/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5351

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5351/
Summaries are generated and may contain mistakes; the official description above is the record.