# MAL-2026-10136: Malicious code in transform-es2015-sticky-regex (npm)


- **Type:** Malicious package
- **Package:** `transform-es2015-sticky-regex` (npm)
- **Published:** 10 Jul 2026
- **Also known as:** GHSA-2j63-q9jc-966c

## What is MAL-2026-10136?

MAL-2026-10136 is a malicious package in transform-es2015-sticky-regex, published on 10 Jul 2026. 

### Official description

package.json declares both a dependency and a devDependency on 'transform-es2015-sticky-regex' pointing at http://pack.nppacks.com/npm/transform-es2015-sticky-regex. On `npm install`, npm fetches whatever tarball that plain-HTTP, non-registry host currently serves and installs it into node_modules with no version pin and no integrity hash — the maintainer of pack.nppacks.com can substitute arbitrary code at any time and it will land in the installer's dependency tree on the next install. The package name is also a namespace-confusion of the well-known 'babel-plugin-transform-es2015-sticky-regex' (Babel plugin naming convention prefixes 'babel-plugin-'); the shipped index.js does not implement the sticky-regex transform but a DefinePlugin-style identifier replacer, and a source comment states the package is 'for Security Research Testing Purpose'. Additional network-capable dependencies (axios, node-fetch, ws) are declared but unused by the shipped code, pre-staging network primitives for whatever the swapped tarball chooses to import.

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-2026-10136?

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-2026-10136 is a malicious package: transform-es2015-sticky-regex (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-2026-10136/ (Markdown: https://insights.sbomify.com/MAL-2026-10136/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-10136

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-10136/
Summaries are generated and may contain mistakes; the official description above is the record.