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VULNERABILITIES

CVE-2026-61551 Details

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.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.6 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/Icinga/icinga2/commit/391504eaa9ed9aee81f84008c57ec821974b74ee [email protected]
https://github.com/Icinga/icinga2/commit/3d9166ff52ff1a64a286c39af57957d63442c137 [email protected]
https://github.com/Icinga/icinga2/commit/4964d2444ca5c4fae9036054554e1c6e0025fb89 [email protected]
https://github.com/Icinga/icinga2/commit/ed163a8aa9d296820dd2ad14c47bf3f6a3fcce7d [email protected]
https://github.com/Icinga/icinga2/pull/10908 [email protected]

see all 10 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-674Uncontrolled Recursion[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-61551
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Sep 24, 2026
Source:
[email protected]