An issue was discovered in Icinga 2.x through 2.8.1.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• icinga icinga2.0.0 and later · up to 2.8.0 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2024-49369Icinga 2 has a TLS Certificate Validation Bypass for JSON-RPC and HTTP API Connections
  40Plan
• CVE-2025-48057Icinga 2 certificate renewal might incorrectly renew an invalid certificate
  37Monitor
• CVE-2021-32743Passwords used to access external services inadvertently exposed through API
  36Monitor
• CVE-2020-29663Icinga 2 v2.8.0 through v2.11.7 and v2.12.2 has an issue where revoked certificates due for renewal will automatically be renewed, ignoring
  36Monitor
• CVE-2021-32739Results of queries for ApiListener objects include the ticket salt which allows in turn to steal (more privileged) identities
  35Monitor
• CVE-2024-24820Icinga Director configuration is susceptible to Cross-Site Request Forgery
  33Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.