NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
Malicious package

delivery-ci-microformsnpm

Advisory published Updated

delivery-ci-microforms is a confirmed malicious npm package (MAL-2026-12676) that executes malicious code on install (malicious version 35.3.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in delivery-ci-microforms (npm)

MAL-2026-12676
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall delivery-ci-microforms

What this malware does

On require('delivery-ci-microforms'), index.js loads support.js which selects a platform-specific endpoint whose hostname is reassembled at runtime from split string arrays, fetches an opaque binary from oob-worker.cf100-416.workers.dev, cf99-9b3.workers.dev, or cf102-baf.workers.dev, or falls back to a chunked base64 payload carried in DNS TXT records under *.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under deceptive names such as dotnet_diag<hex>.exe and.cache_<hex>, chmod 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true, stdio:'ignore'}) or spawn('cmd',...) on Windows. lib/telemetry.js additionally reassembles the 'child_process' module name from a split string ('child_' + 'process') to defeat static inspection, and the drop path is gated behind opt-out env checks (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) with an 'analytics' cover-story naming scheme. Installing or requiring the package auto-executes attacker-controlled code from ephemeral Cloudflare Workers hosts on the installer's machine.

Malicious versions

1 flagged
35.3.5

Indicators of compromise (SHA-256)

3ffef831e876b8114ebfd6559d38f34d2c559dd42263845899e45ee621aa15c7

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for delivery-ci-microforms (version 35.3.5).

  2. If you installed it — respond

    Remove delivery-ci-microforms 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.

  3. Did it already run?

    If delivery-ci-microforms 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. delivery-ci-microforms on npm has been identified as a malicious package (version 35.3.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015097

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks delivery-ci-microforms-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

delivery-ci-microforms (npm) malicious package — MAL-2026-12676 | O3 Security