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critical vulnerability

Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution

Fix availableCritical · CVSS 9.5EPSS 0.50%

Published Oct 5, 2026 · updated Oct 5, 2026

What to do

  1. Upgrade to a fixed version: tinypool 2.1.1.
  2. Redeploy and restart long-running processes so they load the fixed code.

Affected packages

npmtinypool

Vulnerable versions
<= 2.1.0
Fixed in
2.1.1

Check your project: npm ls tinypool --all

Is tinypool@2.1.1 safe to install? See the upgrade verdict →

Sources

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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