Detections
Analytics
CVE-2026-61551
high
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.
References
https://icinga.com/blog/icinga2-security-release-v2-16-2
https://github.com/Icinga/icinga2/security/advisories/GHSA-wh38-wg57-5w7g
https://github.com/Icinga/icinga2/releases/tag/v2.16.2
https://github.com/Icinga/icinga2/releases/tag/v2.15.4
https://github.com/Icinga/icinga2/releases/tag/v2.14.9
https://github.com/Icinga/icinga2/pull/10908
https://github.com/Icinga/icinga2/commit/ed163a8aa9d296820dd2ad14c47bf3f6a3fcce7d
https://github.com/Icinga/icinga2/commit/4964d2444ca5c4fae9036054554e1c6e0025fb89
https://github.com/Icinga/icinga2/commit/3d9166ff52ff1a64a286c39af57957d63442c137
https://github.com/Icinga/icinga2/commit/391504eaa9ed9aee81f84008c57ec821974b74ee