CVE-2026-61550
Icinga 2: Improper access control for JSON-RPC update certificate messages
- State
- Published
- Severity
- 9.8 Critical
- Published
- Sep 18, 2026
- Updated
- Sep 21, 2026
- Reserved
- Jul 10, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
icinga2Icinga |
|
References
- https://github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5
- https://github.com/Icinga/icinga2/pull/10907
- https://github.com/Icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0
- https://github.com/Icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039c
- https://github.com/Icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0
- https://github.com/Icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81
- https://github.com/Icinga/icinga2/releases/tag/v2.14.9
- https://github.com/Icinga/icinga2/releases/tag/v2.15.4
- https://github.com/Icinga/icinga2/releases/tag/v2.16.2
- https://icinga.com/blog/icinga2-security-release-v2-16-2
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