# CVE-2026-61550: icinga2: Icinga 2 is an open source monitoring system

CVE-2026-61550 is fixed in icinga2 on 1 platform, first by DEBIAN-CVE-2026-61550, released August 10, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-61550
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0067
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | icinga2 Debian 13.5 (trixie) | 2.14.6-1+deb13u1 | [DEBIAN-CVE-2026-61550](https://patchblox.com/security/data/fix/linux/debian-cve-2026-61550.md) | Aug 10, 2026 |
| Linux | icinga2 Debian 14 | 2.16.2-1 | [DEBIAN-CVE-2026-61550](https://patchblox.com/security/data/fix/linux/debian-cve-2026-61550.md) | Aug 10, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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