CVE-2026-40742: Nelio Software Nelio Ab Testing

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Missing Authorization vulnerability in Nelio Software Nelio AB Testing nelio-ab-testing allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Nelio AB Testing: from n/a through <= 8.2.8.

Affected products

• Nelio Software Nelio Ab Testing: up to and including 8.2.8

Published 2026-04-15. Last modified 2026-06-17.