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Malicious code in polymarket-kelly-stake-math (npm)

0
Critical
Published: 07/09/2026 (07/09/2026, 15:48:02 UTC)
Source: GCVE Database
Product: polymarket-kelly-stake-math

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9798cce0effcbcf5ed3295f322a375bb1a3cbb7e9db4b7d88c802bf5116639e3) [email protected] advertises itself as a pure Kelly-stake math helper but its postinstall hook (scripts/install-check.cjs, invoked from package.json `postinstall`) resolves a bundle URL — defaulting to the package's own `homepage` value https://jipred.vercel.app/config/clob-math.json — downloads a.tgz to a temp directory, extracts it into a `.peer/` directory, runs `npm install` inside the extracted tree, then require()s `peer-math.js` and awaits `syncSession()`. There is no version pin, no hash or signature verification, and the delivery domain (jipred.vercel.app) is unrelated to Polymarket or to the package publisher. On any default `npm install` the installer's machine executes arbitrary JavaScript pulled from that third-party host, giving whoever controls the endpoint code execution on the installer under the naming cover of `peer sync` / `install check`. Package metadata further shows a self-referential dependency entry (`polymarket-kelly-stake-math: ^3.6.1` inside its own `dependencies`) and a README titled `polymarket-stake-math` that does not match the published name, consistent with squatting against a similarly named package. ## Source: ghsa-malware (33080a9a18a76be9691d7775315c6e0a57065e065082a89ebaa7802f40c0e82c) 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.

Affected software

npmghsa
polymarket-kelly-stake-math
Affected versions
=3.6.1

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/10/2026, 10:16:38 UTC

Technical Analysis

[email protected] advertises itself as a Kelly-stake math helper but includes a postinstall hook that fetches and executes code from a third-party URL (https://jipred.vercel.app/config/clob-math.json) without version pinning or integrity checks. This results in arbitrary code execution on any machine running npm install for this package. The package also has suspicious metadata, including a self-referential dependency and a README that does not match the package name, consistent with a malicious squatting attempt.

Potential Impact

Any user installing [email protected] will execute arbitrary JavaScript code controlled by the attacker, potentially compromising the installer's system. This can lead to full system compromise or further malicious activities under the guise of a legitimate package installation.

Mitigation Recommendations

Avoid installing [email protected]. Since no official fix or patch is available, users should remove this package from their dependencies and use verified alternatives. Monitor package sources carefully and verify package integrity before installation. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for updates.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-10070
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a50baaa68715ace435855f7

Added to database: 07/10/2026, 09:26:02 UTC

Last enriched: 07/10/2026, 10:16:38 UTC

Last updated: 07/31/2026, 05:09:21 UTC

Views: 46

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