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Malicious package

@wizloft/harness-contextnpm

Advisory published Updated

@wizloft/harness-context is a confirmed malicious npm package (MAL-2026-14286) that executes malicious code on install (malicious version 0.1.1-alpha.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @wizloft/harness-context (npm)

MAL-2026-14286
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @wizloft/harness-context

What this malware does

dist/index.js (the package's declared main) contains a heavily obfuscated obfuscator.io-style IIFE appended after the legitimate context-service code. On import, the payload stashes global.r = require and global.m = module, then issues HTTPS requests to an Ethereum public RPC endpoint (h.drpc.org) and a block-explorer account API to read state from contract 0xa322E5f3..., using that state to resolve a next-stage URL that is fetched and executed in-process. The obfuscated string array (~303 entries via a rotated decoder) hides drpc.org, ?module=ac, POST, application/json, Mozilla/5., and the contract address. This is the EtherHiding loader pattern: attacker-controlled contract state serves as a mutable pointer to arbitrary code executed in the installer/consumer process at require time. Behavior does not match the package's advertised purpose of a small typed capability contract.

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
0.1.1-alpha.3

Indicators of compromise (SHA-256)

b0315deb3fb6b42e929a55eafaeaedbf1b428ee8873d4ae31f5ec9956f21b554
e250ba61dd9623df22f284b1b5c2e41513954b57d1e4cc099f2321179a0673cc

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for @wizloft/harness-context (version 0.1.1-alpha.3).

  2. If you installed it — respond

    Remove @wizloft/harness-context 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 @wizloft/harness-context 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. @wizloft/harness-context on npm has been identified as a malicious package (version 0.1.1-alpha.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-018408GHSA-wjhv-xmmw-qqf9

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @wizloft/harness-context-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

@wizloft/harness-context (npm) malicious package — MAL-2026-14286 | O3 Security