MAL-2026-13561 Malicious code in dolyame-ui-contextmenu (npm)
Malicious package
Published
MAL-2026-13561 is a malicious package: dolyame-ui-contextmenu (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-2026-13561/ (Markdown: https://insights.sbomify.com/MAL-2026-13561/index.md)
- Package
- dolyame-ui-contextmenu
- Registry
- npm
What is MAL-2026-13561?
MAL-2026-13561 is a malicious package in dolyame-ui-contextmenu, published on 7 Aug 2026.
Official description
On require() of the package, polyfill.js downloads a platform-specific binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), writes it to a temp path under cover-story names such as 'dotnet_diag.exe' and '.cache_', chmods it 0755, and spawns it detached via cmd.exe or /bin/sh. Destination hostnames are assembled from array fragments (e.g. ["oob-w","orker.cf99-9b3.workers.de","v"].join("")) to evade static scanners, and a base64-over-DNS-TXT covert channel under *.dl.wel1.ru is used to fetch the payload when HTTPS is blocked. The destinations are anonymous Workers subdomains unrelated to any documented purpose of the package, and the delivered bytes are opaque attacker-controlled code executed on the installer's host.
What should I do about MAL-2026-13561?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.