CVE-2023-26133: Progressbar.js Project Progressbar.js

Critical severity, CVSS 9.8. EPSS: 1.3% chance of exploitation in the next 30 days.

All versions of the package progressbar.js are vulnerable to Prototype Pollution via the function extend() in the file utils.js.

Affected products

• Progressbar.js Project Progressbar.js: any version

Published 2023-06-12. Last modified 2026-06-17.