CVE-2026-61550Icinga 2: Improper access control for JSON-RPC update certificate messages
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No exploitation reported and no EPSS estimate yet.
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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
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
- https://github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5x-refsource-confirm
- https://github.com/Icinga/icinga2/pull/10907x-refsource-misc
- https://github.com/Icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0x-refsource-misc
- https://github.com/Icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039cx-refsource-misc
- https://github.com/Icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0x-refsource-misc
- https://github.com/Icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81x-refsource-misc
- https://github.com/Icinga/icinga2/releases/tag/v2.14.9x-refsource-misc
- https://github.com/Icinga/icinga2/releases/tag/v2.15.4x-refsource-misc
- https://github.com/Icinga/icinga2/releases/tag/v2.16.2x-refsource-misc
- https://icinga.com/blog/icinga2-security-release-v2-16-2x-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.