CVE-2026-61551Patch

LOWCVSS 8.6 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-674

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Referenced assets1 URL

By indicator

https://www.valtersit.com/cve/CVE-2026-61551

Full discourse1 post

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters45d
Patch
CVE-2026-61551 Icinga 2 pre-2.14.9/2.15.4/2.16.2: unbounded JSON nesting lets unauthenticated clients on port 5665 crash the process. CVSS 8.6. Patched - update now. https://www.valtersit.com/cve/CVE-2026-61551 #CVE #infosec #Icinga #Icinga #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet #SysAdmin #cybersecurity #devsecops #devops #developer #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #cybersecurityawareness #cybersecuritynews #cybersecuritytips #python #hacker #kali #ubuntu #debian #docker
Post summary
The tweet announces CVE-2026-61551 in Icinga 2, detailing a high-severity DoS vulnerability via unbounded JSON nesting, and primarily emphasizes that the issue is patched in specific versions urging immediate updates.
0000043
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