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CVE-2024-49369

CriticalPublished

Icinga 2 has a TLS Certificate Validation Bypass for JSON-RPC and HTTP API Connections

Published: Nov 12, 2024
Updated: Nov 3, 2025
Assigning CNA: GitHub_M
Evidence observed: Aug 8, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

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

EPSS probability estimate

2.9%

Low · next 30 days

Percentile: 86.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. The TLS certificate validation in all Icinga 2 versions starting from 2.4.0 was flawed, allowing an attacker to impersonate both trusted cluster nodes as well as any API users that use TLS client certificates for authentication (ApiUser objects with the client_cn attribute set). This vulnerability has been fixed in v2.14.3, v2.13.10, v2.12.11, and v2.11.12.

Sources

CVE-2024-49369Exploit
Exploit tool for CVE-2024-49369 in Icinga, enabling subnet scanning, agent takeover via JSON-RPC impersonation, arbitrary command execution, and reverse shell.

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