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CVE

CVE-2026-61550

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

CVE-2026-61550

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

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

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://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61550.json, https://github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5, https://nvd.nist.gov/vuln/detail/CVE-2026-61550, 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/pull/10907, https://icinga.com/blog/icinga2-security-release-v2-16-2

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.0037%
EPSS Percentile
0.3087%
Introduced Version
5855790474c50904efd0c9e31968c04938960a01,0
Fix Available
d37b0cfd7d9595ae2f02fadb3d724c98d8620f81,2.14.6-1+deb13u1

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