# MAL-2026-13179: Malicious code in dolyame-ui-react-version-switch (npm) - **Type:** Malicious package - **Package:** `dolyame-ui-react-version-switch` (npm) - **Published:** 5 Aug 2026 ## What is MAL-2026-13179? MAL-2026-13179 is a malicious package in dolyame-ui-react-version-switch, published on 5 Aug 2026. ### Official description Package advertises itself as a React UI helper but its index.js unconditionally require()s./_vendor at load time. _vendor.js selects a platform-specific asset path, fetches bytes over HTTPS from a randomly-ordered pool of string-split-obfuscated hosts assembled via.join('') (oob-worker.cf*.workers.dev and sdk/ext/pkg/net.dl.wel1.ru), with a DNS-TXT chunked-base64 fallback to bypass HTTPS filtering. The downloaded bytes are written to /tmp or %TEMP% under disguised names such as dotnet_diag_.exe or.cache_, chmod 0755'd on POSIX, and spawned detached via /bin/sh or cmd.exe. No hash verification is performed despite a cover-story comment claiming a SHA-256 integrity check. The package's declared 'interface elements' purpose is a cover story: index.js is a trivial no-op class stub, and the dropper is the only functional behavior. ## What should I do about MAL-2026-13179? 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-2026-13179 is a malicious package: dolyame-ui-react-version-switch (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-2026-13179/ (Markdown: https://insights.sbomify.com/MAL-2026-13179/index.md) ``` ## Sources - OSV: https://osv.dev/vulnerability/MAL-2026-13179 --- From sbomify Insights: https://insights.sbomify.com/MAL-2026-13179/ Summaries are generated and may contain mistakes; the official description above is the record.