MAL-2026-13146 Malicious code in dolyame-ui-codemods (npm)
Malicious package
Published
MAL-2026-13146 is a malicious package: dolyame-ui-codemods (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-2026-13146/ (Markdown: https://insights.sbomify.com/MAL-2026-13146/index.md)
- Package
- dolyame-ui-codemods
- Registry
- npm
What is MAL-2026-13146?
MAL-2026-13146 is a malicious package in dolyame-ui-codemods, published on 5 Aug 2026.
Official description
On require('dolyame-ui-codemods'), index.js loads _polyfill.js, which reconstructs remote hostnames from split string-fragment arrays joined at runtime (assembling oob-worker.*.workers.dev subdomains and sdk/ext/pkg/net.dl.wel1.ru), selects a platform-specific endpoint, downloads a binary over HTTPS, writes it to /var/tmp or %TEMP% under a disguised name resembling dotnet_diag, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. A DNS-TXT-record fallback channel retrieves chunked base64 payloads from numbered subdomains of dl.wel1.ru when HTTPS delivery fails. A cooldown stamp file suppresses repeat execution and environment-variable checks gate execution to evade sandboxes. The package is advertised as a UI toolkit and has no legitimate need for a platform-native binary, obfuscated hostname assembly, or a DNS covert channel. Installing or importing this package causes remote code execution on the host.
What should I do about MAL-2026-13146?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.