# MAL-2026-14266: Malicious code in electron-sessions (npm)


- **Type:** Malicious package
- **Package:** `electron-sessions` (npm)
- **Published:** 19 Aug 2026

## What is MAL-2026-14266?

MAL-2026-14266 is a malicious package in electron-sessions, published on 19 Aug 2026. 

### Official description

Package published as `electron-sessions` advertises itself as generic 'Session utilities' but ships a single 1.18MB heavily obfuscated `dist/index.js` (javascript-obfuscator with rotating string-array of length 4399, control-flow flattening, self-defending wrapper, dead-code injection) as both `main` and `bin`. The bundle contains plaintext substrings `chrome`, `cookies`, `electron` alongside an import of the `@vercel/blob` upload SDK (declared runtime dependency `@vercel/blob: ^2.6.1`), whose primary API uploads arbitrary bytes to a Vercel Blob store held by whoever controls the `BLOB_READ_WRITE_TOKEN`. Package naming targets Electron/Chromium session artifacts (cookies, Local Storage/leveldb, Login Data), the README exposes only a one-line `new Sessions()` cover-story API with no documented upload endpoint or caller-configurable destination, and the upload SDK has no legitimate purpose in a generic session-utilities library. Any process that runs `npx electron-sessions` or `require('electron-sessions')` executes the obfuscated bundle against its own host, and collected session data is shipped to an author-controlled Vercel Blob endpoint.

## What should I do about MAL-2026-14266?

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-2026-14266 is a malicious package: electron-sessions (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-2026-14266/ (Markdown: https://insights.sbomify.com/MAL-2026-14266/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-14266

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-14266/
Summaries are generated and may contain mistakes; the official description above is the record.