Critical 9.8Published Sep 18, 2026

CVE-2026-61550Icinga 2: Improper access control for JSON-RPC update certificate messages

Updated under an hour ago (Oct 26, 2026, 4:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for icinga2

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Icinga icinga2 icinga:icinga2 (from the name)	from 2.8, < 2.14.9; from 2.15.0, < 2.15.4; from 2.16.0, < 2.16.2	CNA record

References

References

https://github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5	x-refsource-confirm
https://github.com/Icinga/icinga2/pull/10907	x-refsource-misc
https://github.com/Icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0	x-refsource-misc
https://github.com/Icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039c	x-refsource-misc
https://github.com/Icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0	x-refsource-misc
https://github.com/Icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81	x-refsource-misc
https://github.com/Icinga/icinga2/releases/tag/v2.14.9	x-refsource-misc
https://github.com/Icinga/icinga2/releases/tag/v2.15.4	x-refsource-misc
https://github.com/Icinga/icinga2/releases/tag/v2.16.2	x-refsource-misc
https://icinga.com/blog/icinga2-security-release-v2-16-2	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.