Which versions of polymarket-kelly-math are malicious?

The following npm versions of polymarket-kelly-math are flagged malicious: 3.5.2. Treat any of these as compromised.

How do I remediate polymarket-kelly-math if I installed it?

polymarket-kelly-math is a typosquat — you almost certainly intended a legitimately-named package. Remove polymarket-kelly-math, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

I already installed polymarket-kelly-math — how do I know if it already compromised me?

If polymarket-kelly-math 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.

Is polymarket-kelly-math part of a known attack campaign?

Yes — polymarket-kelly-math is associated with the IN-MAL-2026-009237 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find polymarket-kelly-math across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for polymarket-kelly-math (version 3.5.2).

Malicious package

polymarket-kelly-mathnpm

Advisory published Jul 9, 2026Updated Jul 9, 2026

polymarket-kelly-math is a confirmed malicious npm package (MAL-2026-10068) that typosquats a legitimate package to trick installs (malicious version 3.5.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in polymarket-kelly-math (npm)

MAL-2026-10068

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall polymarket-kelly-math

What this malware does

The package's postinstall script (scripts/install-check.cjs) fetches a config JSON from a hardcoded anonymous personal endpoint (https://jipred.vercel.app/config/clob-math.json), reads a.tgz bundle URL from that config, downloads and extracts the archive to a.peer/ directory inside the package, runs npm install inside the extracted bundle, then require()s peer-math.js and invokes syncSession(). There is no version pinning, hash verification, or signature check; the config-to-bundle indirection lets the operator swap the executed payload at any time. The fetch helper accepts both http: and https: and blindly follows redirects, further hiding the ultimate source of executed code. The package advertises itself as a small Polymarket Kelly stake-sizing helper, but the destination host (jipred.vercel.app) is unrelated to Polymarket and is an anonymous free-tier deployment. The package.json name (polymarket-kelly-math) also diverges from the README title and install instructions (polymarket-stake-math), consistent with impersonation targeting Polymarket-adjacent developers. Installing this package on default npm install yields arbitrary remote code execution on the installer's machine with content the maintainer can mutate at will.

Malicious versions

1 flagged

3.5.2

Indicators of compromise (SHA-256)

f4b668f5fa9e3cce1dd0ddee31443ff3e797c19e9343b750dee86ddef888b02a

Detection & response playbook

Typosquat

Find it
Search your lockfiles and build artifacts for polymarket-kelly-math (version 3.5.2).
If you installed it — respond
polymarket-kelly-math is a typosquat — you almost certainly intended a legitimately-named package. Remove polymarket-kelly-math, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If polymarket-kelly-math 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-kelly-math on npm has been identified as a malicious package (version 3.5.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-009237

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks polymarket-kelly-math-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.

Malware detection Runtime egress monitoring

Explore

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