CVE catalog
CVE-2026-61550
icinga2: CVE-2026-61550
- Severity
- Critical · CVSS 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.67% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | icinga2 | sid | 2.16.5-1 | fixed |
| Debian | icinga2 | forky | 2.16.5-1 | fixed |
| Debian | icinga2 | trixie | 2.14.6-1 | vulnerable |
| Debian | icinga2 | trixie-security | 2.14.6-1+deb13u1 | fixed |
| Debian | icinga2 | bookworm | 2.13.6-2+deb12u2 | vulnerable |
| Ubuntu | icinga2 | 16.04 | 2.3.8-1build1 | vulnerable |
| Ubuntu | icinga2 | 16.04 | 2.3.11-1 | vulnerable |
| Ubuntu | icinga2 | 16.04 | 2.4.0-1 | vulnerable |
| Ubuntu | icinga2 | 16.04 | 2.4.1-1 | vulnerable |
| Ubuntu | icinga2 | 16.04 | 2.4.1-2 | vulnerable |
| Ubuntu | icinga2 | 16.04 | 2.4.1-2ubuntu1 | vulnerable |
| Ubuntu | icinga2 | 18.04 | 2.7.0-1 | vulnerable |
| Ubuntu | icinga2 | 18.04 | 2.8.1-0ubuntu2 | vulnerable |
| Ubuntu | icinga2 | 20.04 | 2.10.5-1build1 | vulnerable |
| Ubuntu | icinga2 | 20.04 | 2.11.2-1 | vulnerable |
| Ubuntu | icinga2 | 20.04 | 2.11.2-1ubuntu1 | vulnerable |
| Ubuntu | icinga2 | 20.04 | 2.11.2-1ubuntu2 | vulnerable |
| Ubuntu | icinga2 | 20.04 | 2.11.2-1ubuntu3 | vulnerable |
| Ubuntu | icinga2 | 22.04 | 2.12.3-1 | vulnerable |
| Ubuntu | icinga2 | 22.04 | 2.13.1-1 | vulnerable |
| Ubuntu | icinga2 | 22.04 | 2.13.2-1 | vulnerable |
| Ubuntu | icinga2 | 22.04 | 2.13.2-1build1 | vulnerable |
| Ubuntu | icinga2 | 22.04 | 2.13.2-1build2 | vulnerable |
| Ubuntu | icinga2 | 24.04 | 2.13.8-1 | vulnerable |
| Ubuntu | icinga2 | 24.04 | 2.14.1-1 | vulnerable |
| Ubuntu | icinga2 | 24.04 | 2.14.2-1 | vulnerable |
| Ubuntu | icinga2 | 24.04 | 2.14.2-1build1 | vulnerable |
| Ubuntu | icinga2 | 24.04 | 2.14.2-1build2 | vulnerable |
| Ubuntu | icinga2 | 26.04 | 2.15.0-1 | vulnerable |
| Ubuntu | icinga2 | 26.04 | 2.15.1-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | icinga2 | source | sid | 2.16.2-1 | not yet assigned | Not reported | Not reported |
| Debian | icinga2 | source | forky | 2.16.2-1 | not yet assigned | Not reported | Not reported |
| Debian | icinga2 | source | trixie | 2.14.6-1+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | icinga2 | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [icinga2]Affected
Details (2)
2.13.6-2+deb12u2· amd64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
2.13.6-2+deb12u2· arm64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- [icinga2-bin]Affected
Source package: [icinga2]
Details (2)
2.13.6-2+deb12u2· amd64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
2.13.6-2+deb12u2· arm64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- [icinga2-common]Affected
Source package: [icinga2]
Details (2)
2.13.6-2+deb12u2· all · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
2.13.6-2+deb12u2· all · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- [icinga2-doc]Affected
Source package: [icinga2]
Details (2)
2.13.6-2+deb12u2· all · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
2.13.6-2+deb12u2· all · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- [icinga2-ido-mysql]Affected
Source package: [icinga2]
Details (2)
2.13.6-2+deb12u2· amd64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
2.13.6-2+deb12u2· arm64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- [icinga2-ido-pgsql]Affected
Source package: [icinga2]
Details (2)
2.13.6-2+deb12u2· amd64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
2.13.6-2+deb12u2· arm64 · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- [vim-icinga2]Affected
Source package: [icinga2]
Details (2)
2.13.6-2+deb12u2· all · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
2.13.6-2+deb12u2· all · bookwormAffected
dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
[Debian 13 (Trixie)]
- [icinga2]Affected
Details (4)
2.14.6-1· amd64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1· arm64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
- [icinga2-bin]Affected
Source package: [icinga2]
Details (4)
2.14.6-1· amd64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1· arm64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
- [icinga2-common]Affected
Source package: [icinga2]
Details (4)
2.14.6-1· all · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1· all · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· all · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· all · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
- [icinga2-doc]Affected
Source package: [icinga2]
Details (4)
2.14.6-1· all · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1· all · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· all · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· all · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
- [icinga2-ido-mysql]Affected
Source package: [icinga2]
Details (4)
2.14.6-1· amd64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1· arm64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
- [icinga2-ido-pgsql]Affected
Source package: [icinga2]
Details (4)
2.14.6-1· amd64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1· arm64 · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
- [vim-icinga2]Affected
Source package: [icinga2]
Details (4)
2.14.6-1· all · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1· all · trixieAffected · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· all · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
2.14.6-1+deb13u1· all · trixie-securityFixed · Fixed:
2.14.6-1+deb13u1dsa · icinga2 · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-61550]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-61550]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-61550]
- [https://security-tracker.debian.org/tracker/CVE-2026-61550]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2136.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]