Icinga 2: Improper access control for JSON-RPC update certificate messages

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-61550
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 18:17:08 UTC
Updated2026-09-18 18:17:08 UTC
DescriptionIcinga 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-862 | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Icinga Icinga2 affected >= 2.8, < 2.14.9 Not specified
CNA Icinga Icinga2 affected >= 2.15.0, < 2.15.4 Not specified
CNA Icinga Icinga2 affected >= 2.16.0, < 2.16.2 Not specified

References

ReferenceSourceLinkTags
icinga.com/blog/icinga2-security-release-v2-16-2 [email protected] icinga.com
github.com/Icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039c [email protected] github.com
github.com/Icinga/icinga2/pull/10907 [email protected] github.com
github.com/Icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81 [email protected] github.com
github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5 [email protected] github.com
github.com/Icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0 [email protected] github.com
github.com/Icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0 [email protected] github.com
github.com/Icinga/icinga2/releases/tag/v2.16.2 [email protected] github.com
github.com/Icinga/icinga2/releases/tag/v2.15.4 [email protected] github.com
github.com/Icinga/icinga2/releases/tag/v2.14.9 [email protected] github.com
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