# MAL-2026-18344: Malicious code in adyen-web-v6 (npm)


- **Type:** Malicious package
- **Package:** `adyen-web-v6` (npm)
- **Published:** 27 Oct 2026
- **Also known as:** GHSA-r77r-rw3m-rjh5

## What is MAL-2026-18344?

MAL-2026-18344 is a malicious package in adyen-web-v6, published on 27 Oct 2026. 

### Official description

Package adyen-web-v6 version 0.0.0-stage contains two files and no detected install-time or import-time code that reads installer secrets, contacts external endpoints, drops or executes remote content, modifies the installer's filesystem outside its own directory, or opens a backdoor. The name resembles the Adyen web SDK family, but name resemblance alone is not a supply-chain threat and the shipped contents show no exfiltration, dropper, silent-relay, or persistence mechanism. The 0.0.0-stage version string and minimal file count are consistent with a placeholder or staging publication.

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-2026-18344?

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-2026-18344 is a malicious package: adyen-web-v6 (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-2026-18344/ (Markdown: https://insights.sbomify.com/MAL-2026-18344/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-18344

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-18344/
Summaries are generated and may contain mistakes; the official description above is the record.