CVE catalog
CVE-2026-61551
icinga2: CVE-2026-61551
- Severity
- High · CVSS 8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.94% · Oct 25, 2026
Icinga 2 is an open source monitoring system. Prior to 2.14.9, 2.15.4, and 2.16.2, parsing deeply nested JSON can exhaust the call stack because nesting depth is not bounded. The affected JSON parsing paths are reachable by unauthenticated network clients through the Icinga 2 service on TCP port 5665, allowing a remote attacker to crash the process, while possible code execution has not been demonstrated. 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-2026-61551]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-61551]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-61551]
- [https://security-tracker.debian.org/tracker/CVE-2026-61551]
- [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]