CVE-2026-61551 Icinga 2 - Denial of Service

Icinga 2 < 2.14.9, < 2.15.4, and < 2.16.2 contain a denial of service caused by unbounded JSON nesting depth in the parser, letting remote unauthenticated attackers crash the process via TCP port 5665.

CVSS base score 8.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.94% chance of exploitation in 30 days
View the NVD record ↗