High severity8.6NVD Advisory· Published Sep 18, 2026
CVE-2026-61551
CVE-2026-61551
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.
Affected products
1Patches
Vulnerability mechanics
References
10- github.com/Icinga/icinga2/commit/391504eaa9ed9aee81f84008c57ec821974b74eenvd
- github.com/Icinga/icinga2/commit/3d9166ff52ff1a64a286c39af57957d63442c137nvd
- github.com/Icinga/icinga2/commit/4964d2444ca5c4fae9036054554e1c6e0025fb89nvd
- github.com/Icinga/icinga2/commit/ed163a8aa9d296820dd2ad14c47bf3f6a3fcce7dnvd
- github.com/Icinga/icinga2/pull/10908nvd
- github.com/Icinga/icinga2/releases/tag/v2.14.9nvd
- github.com/Icinga/icinga2/releases/tag/v2.15.4nvd
- github.com/Icinga/icinga2/releases/tag/v2.16.2nvd
- github.com/Icinga/icinga2/security/advisories/GHSA-wh38-wg57-5w7gnvd
- icinga.com/blog/icinga2-security-release-v2-16-2nvd
News mentions
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