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CVE-2026-61551
Icinga 2: Stack overflow via deeply nested JSON objects
High8.6EPSS 0.94%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H |
- EPSS (exploitation in 30 days)
- 0.94% · top 39% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Weakness
Affected products
References (10)
- https://github.com/Icinga/icinga2/security/advisories/GHSA-wh38-wg57-5w7g (opens in a new tab)x_refsource_CONFIRM
- https://github.com/Icinga/icinga2/pull/10908 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/391504eaa9ed9aee81f84008c57ec821974b74ee (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/3d9166ff52ff1a64a286c39af57957d63442c137 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/4964d2444ca5c4fae9036054554e1c6e0025fb89 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/commit/ed163a8aa9d296820dd2ad14c47bf3f6a3fcce7d (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/releases/tag/v2.14.9 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/releases/tag/v2.15.4 (opens in a new tab)x_refsource_MISC
- https://github.com/Icinga/icinga2/releases/tag/v2.16.2 (opens in a new tab)x_refsource_MISC
- https://icinga.com/blog/icinga2-security-release-v2-16-2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-61551)Record last updated .