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Malicious package

viteplugiinnpm

Advisory published Updated

viteplugiin is a confirmed malicious npm package (MAL-2026-10546) that typosquats a legitimate package to trick installs (malicious version 1.0.28). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in viteplugiin (npm)

MAL-2026-10546
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall viteplugiin

What this malware does

The npm package 'viteplugiin' impersonates '@base44/viteplugin' via a one-character insertion (doubled 'i') and ships a hostile payload in dist/index.js, the entry resolved by the package's exports map. After the legitimate-looking plugin code, a large whitespace gap conceals an obfuscated stub that uses Fisher-Yates string shuffles with hardcoded seeds to reconstruct the identifiers 'require', '__dirname', '__filename', 'undefined', and 'constructor', reassigns require/__dirname/__filename onto the global object, obtains the Function constructor, and invokes it on two decoded string bodies — executing attacker-controlled JavaScript at module load time in the consumer's Vite build. Because Vite configs import plugins at config-evaluation time, adding this plugin to vite.config.* causes the payload to run on developer and CI machines during any Vite command. Provenance is consistent with an attack drop: empty author field, no repository/homepage, and package.json 'main' pointing at a nonexistent root index.js while the exports map silently routes '.' to the tampered dist/index.js. The README and internal resolveId targets reference the legitimate '@base44/vite-plugin' as cover.

Malicious versions

1 flagged
1.0.28

Indicators of compromise (SHA-256)

5afbe0fab50b9582867bb208b6cfb20080849e27d27df79711f55e2db69f66bb

Detection & response playbook

Typosquat
  1. Find it

    Search your lockfiles and build artifacts for viteplugiin (version 1.0.28).

  2. If you installed it — respond

    viteplugiin is a typosquat — you almost certainly intended a legitimately-named package. Remove viteplugiin, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

  3. Did it already run?

    If viteplugiin 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

No. viteplugiin on npm has been identified as a malicious package (version 1.0.28 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-010390

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks viteplugiin-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.

Explore

viteplugiin (npm) malicious package — MAL-2026-10546 | O3 Security