CVE-2026-61551

HighCVSS 8.6/10Last modified Sep 24, 2026

Description

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.

Metrics

CVSS 3.1 8.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Weakness enumeration

CWE-674

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Icinga	icinga2	< 2.14.9; >= 2.15.0, < 2.15.4; >= 2.16.0, < 2.16.2

References

Timeline

Published: Sep 18, 2026
Last modified: Sep 24, 2026
NVD status: Awaiting Analysis

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