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CVE-2026-61550
Icinga 2: Improper access control for JSON-RPC update certificate messages
Critical9.8EPSS 0.67%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.67% · top 48% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
References (10)
- https://github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/Icinga/icinga2/pull/10907 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039c (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/releases/tag/v2.14.9 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/releases/tag/v2.15.4 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/releases/tag/v2.16.2 (opens in a new tab)x_refsource_MISC
- https://icinga.com/blog/icinga2-security-release-v2-16-2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-61550)Record last updated .