| Name | CVE-2026-61551 |
| 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 (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6426-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| icinga2 (PTS) | bookworm | 2.13.6-2+deb12u2 | vulnerable |
| trixie | 2.14.6-1 | vulnerable | |
| trixie (security) | 2.14.6-1+deb13u1 | fixed | |
| forky, sid | 2.16.5-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| icinga2 | source | trixie | 2.14.6-1+deb13u1 | DSA-6426-1 | ||
| icinga2 | source | (unstable) | 2.16.2-1 |
https://github.com/Icinga/icinga2/security/advisories/GHSA-wh38-wg57-5w7g
https://icinga.com/blog/icinga2-security-release-v2-16-2/
Fixed by: https://github.com/Icinga/icinga2/commit/ed163a8aa9d296820dd2ad14c47bf3f6a3fcce7d (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/b80132db87f0ead29d9061cf63d38ff69d92a616 (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/5ff0e61ad85cac5554b9560a4cee328512890e07 (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/547b55031a531c5579a966af8d7bc3675a7b1633 (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/dfda80415d41dabd0b04a350f1e7d2424b63fabd (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/77effd5bbbbf4e4b376b8a642ba5869ddd0bd416 (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/5288e833419d339c49c9f4f53ea41a008ae6c771 (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/f5b02b4885ff075b1ae5f8c0896878491fce1e10 (v2.16.2)
Fixed by: https://github.com/Icinga/icinga2/commit/391504eaa9ed9aee81f84008c57ec821974b74ee (v2.14.9)
Fixed by: https://github.com/Icinga/icinga2/commit/6382675448bd28ca798e5d55d9a2306ad55ae509 (v2.14.9)
Fixed by: https://github.com/Icinga/icinga2/commit/5bf588369d90d72184da526528d8783ea6bf8e08 (v2.14.9)
Fixed by: https://github.com/Icinga/icinga2/commit/011c831632ed34c1f4ae33c3c9a72945b5e340c4 (v2.14.9)
Fixed by: https://github.com/Icinga/icinga2/commit/2d3277799cf16b7546156f1b8e8db0df2604a14f (v2.14.9)
Fixed by: https://github.com/Icinga/icinga2/commit/69093a8ae0f09bbef8f589cbc67f131f167e5aa3 (v2.14.9)
Fixed by: https://github.com/Icinga/icinga2/commit/221d3fa9a66c248bc478220e4a73e1be661dd449 (v2.14.9)
Fixed by: https://github.com/Icinga/icinga2/commit/e23a3eb42d791f27c1073b56769800fe12156425 (v2.14.9)