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Malicious package

vue-template-compiler-pluginnpm

vue-template-compiler-plugin is a confirmed malicious npm package (MAL-2026-3777) that steals credentials and exfiltrates sensitive data (malicious version 2.7.18). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in vue-template-compiler-plugin (npm)

MAL-2026-3777
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall vue-template-compiler-plugin

What this malware does

Full C2 implant disguised as vue-template-compiler fork. postinstall-run.cjs loads tooling-bootstrap.cjs which contains base64-encoded C2 agent. Decoded payload: registers victim (hostname, username, OS) to Cloudflare tunnel C2 at maiden-apply-looks-education.trycloudflare.com, beacons for tasks, reports results, uploads files. Persists agent ID in ~/.gradle-cache/.aid. Has C2_TLS_INSECURE env var bypass. Package mirrors vue-template-compiler version 2.7.16 and claims to be an 'API-compatible fork with postinstall hooks' — social engineering for npm override/alias substitution.

This package impersonates the legitimate vue-template-compiler (same version 2.7.18, framed as an "API-compatible fork"), and its package.json description instructs consumers to alias the real name to this one via npm overrides or resolve.alias. On install, the postinstall hook (postinstall-run.cjs) loads tooling-bootstrap.cjs, which assembles ~80 base64 string fragments in BOOTSTRAP_B64, Buffer.from-decodes them, writes the result to ~/.gradle/daemon/tooling-api-runtime.mjs (a cover-story path mimicking a Gradle cache), and then spawns node on that file with detached: true, stdio: 'ignore', windowsHide: true, and child.unref() so the process survives npm install. The decoded payload is a remote-access trojan that polls https://maiden-apply-looks-education.trycloudflare.com/ for commands, executes arbitrary shell commands on the installer's host, and exfiltrates files. Three independent block signals: (1) typosquat-with-divergent-API against a top-tier Vue package, (2) obfuscated base64-chunked executable payload decoded and exec'd at install, (3) persistent detached RAT beaconing to an attacker-controlled Cloudflare quick-tunnel.

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

1 flagged
2.7.18

Indicators of compromise (SHA-256)

de772e4b79f4da4ae64ea768f8ddc74bd6cd5d5c41f971d30de12ca0c8ed70c1
058983390d0c65259c8cc8fc39e4eeeee617130be84ce97e0b71f790a4b14313

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for vue-template-compiler-plugin (version 2.7.18). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging vue-template-compiler-plugin across your stack and pipelines.

  2. If you installed it — respond

    vue-template-compiler-plugin is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If vue-template-compiler-plugin was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks vue-template-compiler-plugin before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. vue-template-compiler-plugin on npm has been identified as a malicious package (version 2.7.18 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-002723GHSA-gvmg-cf54-7769

References

Credits

  • Amazon Inspector · finder
  • SafeDep · finder

Detect & block this

O3 blocks vue-template-compiler-plugin-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

vue-template-compiler-plugin (npm) malicious package — MAL-2026-3777 | O3 Security