CVE-2026-61550 — Icinga 2: Improper access control for JSON-RPC update certificate messages
Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trus…
Published: 2026-09-18 · CVSS: 9.8 · CVSS 3.1
Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7