MalwarePublished 10 Jul 2026Updated 1 Sep 2026

polygon-gamma-apis (npm) · Malicious Code

Affects polygon-gamma-apisSource GCVE Database

Malicious package : remove polygon-gamma-apis and rotate any secrets on hosts that installed it.

Data as of 12 Sep 2026, 19:01 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-10148

What to do

Remove polygon-gamma-apis from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmpolygon-gamma-apis	Affected =2.0.0 =1.5.2	Fixed in–

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Description

The polygon-gamma-apis npm package version 1.5.2 and 2.0.0 is a malicious package impersonating a legitimate Polymarket SDK. It executes attacker-controlled JavaScript fetched from a remote URL, enabling arbitrary code execution within the consumer's Node.js process. This can lead to credential and wallet theft by loading native modules. Any system with this package installed should be considered fully compromised.

Impact

Systems that have installed or run polygon-gamma-apis versions 1.5.2 or 2.0.0 are fully compromised. The attacker gains arbitrary code execution with access to sensitive Node.js internals, enabling theft of credentials, wallets, and potentially other secrets stored on the system. This level of compromise means all secrets and keys on the affected system should be considered exposed and rotated immediately from a clean environment. Removing the package alone does not guarantee removal of all malicious artifacts.

Defensive guidance

The package should be immediately removed from all systems. All secrets, credentials, and keys stored on affected systems must be rotated from a different, uncompromised computer. Due to the severity and nature of the compromise, affected systems should be treated as fully compromised and rebuilt if possible. Avoid using polygon-gamma-apis versions 1.5.2 and 2.0.0 or any untrusted packages impersonating legitimate SDKs.

Summary

The polygon-gamma-apis package, advertised as a TypeScript SDK for the Polymarket CLOB API, does not provide legitimate API functionality. Instead, its exported function fetches JavaScript code from https://svganchordev.net/icons/111 and executes it dynamically using the Function constructor with access to Node.js internals like require, process, and Buffer. This allows the attacker to load native modules such as dpapi, better-sqlite3, and node-machine-id to steal credentials and wallets. The package name and description are designed to impersonate the real @polymarket/clob-client to deceive developers. The malicious code is obfuscated with decoy constants referencing legitimate CDNs to disguise the malicious network request as an icon fetch. Any consumer invoking the default export runs arbitrary attacker-controlled code.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 12 Sep 2026, 19:01 UTC

Technical details

References

Community reviews