Icinga 2: Improper access control for JSON-RPC update certificate messages
Priority MEDIUM 50CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00674 52nd percentileScored 2026-11-07
Fix Fixed icinga2 (Icinga): 2.14.9, 2.15.4, 2.16.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Icinga | icinga2 | 2.8 to before 2.14.9; 2.15.0 to before 2.15.4; 2.16.0 to before 2.16.2 | 2.14.9, 2.15.4, 2.16.2 | Patch available | CNA |
- icinga2 VendorIcinga Affected 2.8 to before 2.14.9; 2.15.0 to before 2.15.4; 2.16.0 to before 2.16.2 Fixed in 2.14.9, 2.15.4, 2.16.2 Patch available CNA
Remediation
- Fix · CNA icinga2 (Icinga) Fixed in 2.14.9, 2.15.4, 2.16.2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-61550
References
Other 10
- https://github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5
- https://github.com/Icinga/icinga2/pull/10907
- 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/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://icinga.com/blog/icinga2-security-release-v2-16-2
More Icinga vulnerabilities
- TI-2022-08531 Path traversal in Icinga Web 2 CVSS 3.1HIGH 7.5
- TI-2024-16337 Icinga Director configuration is susceptible to Cross-Site Request Forgery CVSS 3.1HIGH 8.3
- TI-2012-05060 Multiple stack-based buffer overflows in the get_history function in history.cgi in… CVSS 2.0HIGH 7.5
- TI-2013-05840 Multiple off-by-one errors in Nagios Core 3.5.1, 4.0.2, and earlier, and Icinga before… CVSS 2.0MEDIUM 5.5
- TI-2022-08530 Arbitrary code execution for authenticated users in Icinga Web 2 CVSS 3.1HIGH 8.8
- TI-2024-32957 Icinga 2 has a TLS Certificate Validation Bypass for JSON-RPC and HTTP API Connections CVSS 3.1CRITICAL 9.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences