Improper access control in Icinga - #VU135839
Published: June 29, 2026
Vulnerability identifier: #VU135839
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Icinga
Affected software:
Icinga
Icinga
Detailed vulnerability description
The vulnerability allows a remote attacker to take control over the node.
The vulnerability exists due to improper access control in certificate update JSON-RPC message handling when processing certificate update messages. A remote attacker can send a specially crafted certificate update message to take control over the node.
An attacker can update both the node's own certificate and the trusted CA certificate, enabling impersonation of a trusted node.
Remediation
Install security update from vendor's website.