# MAL-2026-5912: Malicious code in js-digest (npm)


- **Type:** Malicious package
- **Package:** `js-digest` (npm)
- **Published:** 16 Jun 2026

## What is MAL-2026-5912?

MAL-2026-5912 is a malicious package in js-digest, published on 16 Jun 2026. 

### Official description

Package impersonates crypto-js: name is `js-digest` but `package.json` carries crypto-js's exact description ("JavaScript library of cryptography standards."), homepage `http://github.com/brix/js-digest` (brix is the crypto-js org), and author "Evan Vosberg" (the crypto-js maintainer). `package.json` declares `"preinstall": "./lib/install-deps.mjs"`, but `lib/install-deps.mjs` is not JavaScript — it is a 3.2 MB Linux x86_64 ELF binary (magic `7F 45 4C 46`, sha256 `7883bda1ff15425f2dbe622c45a3ae105ddfa6175009bbf0b0cad9bf5c79b316`). On `npm install`, npm's preinstall hook executes this native binary with the installer's privileges before any code is reviewed. Strings extracted from the binary show a multi-platform credential harvester: HTTP requests scraping GitHub (`GET /user`, `/user/repos` with `Authorization: Bearer...`), Slack (`POST /api/auth.test` with `Cookie: d=`), Discord, Microsoft Teams (`/api/mt/*`), and HashiCorp Vault (`X-Vault-Token`, `/v1/...`); reads of `/.vault-token`, `/.vault/token`, `gpg --batch --no-tty --list-keys`, and `/proc/<pid>/{mem,cmdline,environ}`; and multipart POST uploads to remote endpoints. The binary also embeds systemd unit templates (`[Unit]/[Service]/ExecStart=.../Restart=always`) for both system (`/etc/systemd/system/`) and user (`~/.config/systemd/user/`) scopes for persistence, plus libbpf rootkit primitives (`bpf_object__open_mem`, `bpf_map__pin`, `bpf_program__attach`, maps `hidden_pids`/`hidden_inodes`/`hidden_names`, `/sys/fs/bpf/`) for kernel-level concealment from `ps`/`ls`/`lsof`. Installing this package compromises the host with a persistent, hidden credential stealer.

## What should I do about MAL-2026-5912?

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-2026-5912 is a malicious package: js-digest (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-2026-5912/ (Markdown: https://insights.sbomify.com/MAL-2026-5912/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-5912

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-5912/
Summaries are generated and may contain mistakes; the official description above is the record.