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Malicious MAL-2026-5935 GHSA-g2wq-vjqj-xc3h

tw-theme-kit

npm package · versions 1.1.0, 1.0.1

Reported Jun 16, 2026 · Updated Aug 31, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (0144b9ea6743e481e49885f6375a8aa990e9a20bfc5da1148b7df59a9370736c)
The published entrypoints dist/index.cjs and dist/runtime.cjs contain an injected IIFE that assigns `global.r = require` and `global.m = module`, tags the host with campaign id 'A6-Orion-271', uses a string-shuffle helper to reconstruct the identifier 'constructor', then invokes Function() on a deshuffled obfuscated blob and immediately calls the resulting function. Any consumer that does `require('tw-theme-kit')` or `import 'tw-theme-kit/runtime'` triggers attacker-controlled code at load time with full Node capabilities (fs, child_process, net) exposed via the globals. This behavior is unrelated to the package's stated purpose (a Tailwind theme plugin) and matches the fingerprint of the 'Orion' obfuscated-loader campaign. The.mjs builds and source-maps embed the same obfuscated literal, so no entrypoint is safe.

Source: ghsa-malware (de70cc0bc70c11c34e04c2cdaea11b8e0173befc31c43e2921933c180736ffa3)
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.