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Malicious package

polymarket-toolkitnpm

Advisory published Updated

polymarket-toolkit is a confirmed malicious npm package (MAL-2026-6713) that steals credentials and exfiltrates sensitive data (malicious version 1.4.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in polymarket-toolkit (npm)

MAL-2026-6713
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall polymarket-toolkit

What this malware does

Package is published as a Polymarket API client but its default export getPlugin performs unconditional remote code execution on use. On invocation it issues an HTTPS request to https://svganchordev.net/icons/109, takes the data.credits field from the JSON response, and passes it to new Function('require','module',...,'Promise', data.credits) with a context object exposing require, process, Buffer, and related Node primitives, then immediately invokes it. The fetched JavaScript runs with full Node privileges on the installer's machine. The surrounding code is dressed as an icon/CDN helper (variable names IconProvider, iconDomain, a map of cloudflare/fastly/akamai hosts, font-awesome path literals), but those strings are unused decoys; the live request path resolves to the hardcoded svganchordev.net host. Declared dependencies (@primno/dpapi for Windows DPAPI, better-sqlite3, node-machine-id) are consistent with browser-credential and machine-fingerprint extraction and are unrelated to a Polymarket API SDK. Package keywords (react, helper, svg) also do not match the advertised purpose. The shape is a brand-impersonating dropper targeting developers searching for a Polymarket toolkit.

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
1.4.9

Indicators of compromise (SHA-256)

65aa9243f492d222e1bb036c8ed55fb17268bd987a63ad2ea2aa1b28e44defc3
a4bf97d5bf46ca471f898d6b4d465215c327dcf42f4839929970de1556ec55de

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for polymarket-toolkit (version 1.4.9).

  2. If you installed it — respond

    polymarket-toolkit 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 polymarket-toolkit 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. polymarket-toolkit on npm has been identified as a malicious package (version 1.4.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-007886GHSA-w7x3-5xp7-6pw8

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks polymarket-toolkit-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

polymarket-toolkit (npm) malicious package — MAL-2026-6713 | O3 Security