CVE-2018-6535: Icinga

High severity, CVSS 8.1. EPSS: 1.3% chance of exploitation in the next 30 days.

An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacker.

Affected products

• Icinga Icinga: from 2.0.0, up to and including 2.8.1

Published 2018-02-27. Last modified 2026-06-17.