# MAL-2026-5425: Malicious code in @oplus/obus-web-sdk (npm)


- **Type:** Malicious package
- **Package:** `@oplus/obus-web-sdk` (npm)
- **Published:** 9 Jun 2026

## What is MAL-2026-5425?

MAL-2026-5425 is a malicious package in @oplus/obus-web-sdk, published on 9 Jun 2026. 

### Official description

On `npm install`, the package's `scripts/postinstall.js` collects the installer's username (`os.userInfo()`), hostname (`os.hostname()`), current working directory (`process.cwd()`), and public IP (fetched from `https://api.ipify.org`), then exfiltrates the data to a hardcoded interactsh C2 subdomain `xjaipnfhcpawuhzlgzkzo1ak3aai9m873.oast.fun` through two channels: a DNS lookup with the hex-encoded payload as a subdomain, and an HTTPS GET to `/poc` carrying the data base64-encoded in an `x-poc` header. The package uses the `@oplus` scope (impersonating OPlus/Oppo internal namespaces) and is published at version `99.99.99` — the canonical dependency-confusion pattern designed to outrank any legitimate internal release during resolution. The in-source comment framing this as a benign PoC does not change the installer-side harm: any build that resolves `@oplus/obus-web-sdk` against the public registry will leak host/user/IP/cwd to attacker infrastructure.

## What should I do about MAL-2026-5425?

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-2026-5425 is a malicious package: @oplus/obus-web-sdk (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-2026-5425/ (Markdown: https://insights.sbomify.com/MAL-2026-5425/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5425

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-5425/
Summaries are generated and may contain mistakes; the official description above is the record.