# MAL-2026-10778: Malicious code in relativity-pdfjs-dist (npm)


- **Type:** Malicious package
- **Package:** `relativity-pdfjs-dist` (npm)
- **Published:** 18 Jul 2026

## What is MAL-2026-10778?

MAL-2026-10778 is a malicious package in relativity-pdfjs-dist, published on 18 Jul 2026. 

### Official description

package.json declares a preinstall script that runs `node -e` inline JavaScript on npm install. The inline code collects the installer's hostname, username, current working directory, npm registry configuration, CI environment markers (CI, GITHUB_REPOSITORY, JENKINS_URL), and platform, base64-encodes the JSON, and sends it as an HTTPS GET query parameter to `9u4hlcu3febavvzbrqulpuwf66cy0qof.oastify.com`, a Burp Collaborator out-of-band exfiltration endpoint. The package name resembles the legitimate `pdfjs-dist` package and the version number `99.9.9` is a dependency-confusion pattern intended to outrank an internal package of the same name.

The OpenSSF Package Analysis project identified 'relativity-pdfjs-dist' @ 5.8.2 (npm) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.

- The package executes one or more commands associated with malicious behavior.

## What should I do about MAL-2026-10778?

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-2026-10778 is a malicious package: relativity-pdfjs-dist (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-2026-10778/ (Markdown: https://insights.sbomify.com/MAL-2026-10778/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-10778

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-10778/
Summaries are generated and may contain mistakes; the official description above is the record.