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Icinga 2: Stack overflow via deeply nested JSON objects

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-61551

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-61551

icinga2

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Icinga",
    "product": "icinga2",
    "versions": [
      {
        "status": "affected",
        "version": "< 2.14.9"
      },
      {
        "status": "affected",
        "version": ">= 2.15.0, < 2.15.4"
      },
      {
        "status": "affected",
        "version": ">= 2.16.0, < 2.16.2"
      }
    ]
  }
]
Related CVEs
CVE-2026-61551

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#1919 · Revision 1
Added to Heist Feed
Publisher date
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