Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-61551— Icinga 2: Stack overflow via deeply nested JSON objects

Quick assessment

Affected
Icinga icinga2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 thro

CVSS 8.6 · High

Affected Version Matrix 3

VendorProduct Version RangeStatus
Icinga icinga2 < 2.14.9 affected
>= 2.15.0, < 2.15.4 affected
>= 2.16.0, < 2.16.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-61551

Vulnerability Information

Shenlong is analyzing...

Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Icinga 2: Stack overflow via deeply nested JSON objects
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Icinga icinga2 < 2.14.9 -

II. Public POCs for CVE-2026-61551

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-61551

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-61551 (5)

Security Blog Posts for CVE-2026-61551 (1)

Other References for CVE-2026-61551 (4)

Same Patch Batch · Icinga · 2026-09-18 · 3 CVEs total

CVE-2026-61550 9.8 CRITICAL Icinga 2: Improper access control for JSON-RPC update certificate messages
CVE-2026-61552 7.2 HIGH Icinga 2 DSL Injection via Unescaped Import Template Name

IV. Related Vulnerabilities

Same product: icinga2
Same vendor: Icinga
Same weakness: CWE-674

V. Comments for CVE-2026-61551

No comments yet

Leave a comment