{"id":"CVE-2026-61550","aliases":["DEBIAN-CVE-2026-61550","EUVD-2026-83208","GHSA-vj39-ww8j-vvx5","UBUNTU-CVE-2026-61550"],"status":"published","title":"Icinga 2: Improper access control for JSON-RPC update certificate messages","description":"Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00674,"percentile":0.52592,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-862"],"published":"2026-09-18T17:21:18Z","modified":"2026-11-04T20:04:21Z","fixes":[{"ecosystem":"Debian:13","package":"icinga2","fixed_in":["2.14.6-1+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"icinga2","fixed_in":["2.16.2-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.13.6-2","2.13.6-2+deb12u1","2.13.6-2+deb12u2","2.13.7-1","2.13.7-1~exp1","2.13.8-1","2.14.0-1~exp1","2.14.1-1","2.14.2-1","2.14.2-1+loong64","2.14.3-1","2.14.4-1","2.14.5-1","2.14.6-1","2.15.0-1","2.15.0-1~exp1","2.15.1-1","2.15.2-1","2.15.2-2","2.16.0-1","2.16.0-2","2.16.0-3~exp1","2.16.0-3~exp2","2.16.0-3~exp3","2.16.0-3~exp4","2.16.1-1","2.16.1-1~exp1","2.16.2-1","2.16.2-2","2.16.3-1","2.16.4-1","2.16.5-1"]},{"source":"osv","ecosystem":"Debian:13","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14.6-1+deb13u1"}]}],"versions":["2.14.6-1"]},{"source":"osv","ecosystem":"Debian:14","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.16.2-1"}]}],"versions":["2.14.6-1","2.15.0-1","2.15.0-1~exp1","2.15.1-1","2.15.2-1","2.15.2-2","2.16.0-1","2.16.0-2","2.16.0-3~exp1","2.16.0-3~exp2","2.16.0-3~exp3","2.16.0-3~exp4","2.16.1-1","2.16.1-1~exp1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.0-1","2.8.1-0ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.5-1build1","2.11.2-1","2.11.2-1ubuntu1","2.11.2-1ubuntu2","2.11.2-1ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.3-1","2.13.1-1","2.13.2-1","2.13.2-1build1","2.13.2-1build2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.13.8-1","2.14.1-1","2.14.2-1","2.14.2-1build1","2.14.2-1build2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.0-1","2.15.1-1"]}],"products":[{"vendor":"icinga","product":"icinga2"}],"references":[{"url":"https://github.com/Icinga/icinga2/security/advisories/GHSA-vj39-ww8j-vvx5","tags":["x_refsource_CONFIRM","advisory","report"]},{"url":"https://github.com/Icinga/icinga2/pull/10907","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/Icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/Icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039c","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/Icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/Icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/Icinga/icinga2/releases/tag/v2.14.9","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/Icinga/icinga2/releases/tag/v2.15.4","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/Icinga/icinga2/releases/tag/v2.16.2","tags":["x_refsource_MISC","web"]},{"url":"https://icinga.com/blog/icinga2-security-release-v2-16-2","tags":["x_refsource_MISC","article"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61550.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61550","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-61550","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-61550","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61550","tags":["report"]},{"url":"https://icinga.com/blog/icinga2-security-release-v2-16-2/","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-61550","title":"Icinga 2: Improper access control for JSON-RPC update certificate messages","description":"Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.","status":"published","published":"2026-09-18T17:21:18.217Z","modified":"2026-09-21T20:49:08.713Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:19:53.4444Z"}],"euvd":[{"id":"EUVD-2026-83208","description":"Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.","status":"published","published":"2026-09-18T17:21:18Z","modified":"2026-09-21T20:49:08Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:28:04.224689Z"}],"nvd":[{"id":"CVE-2026-61550","description":"Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.","status":"published","published":"2026-09-18T18:17:08.217Z","modified":"2026-09-24T21:17:43.237Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:12:50.043898Z"}],"osv":[{"id":"CVE-2026-61550","title":"Icinga 2: Improper access control for JSON-RPC update certificate messages","description":"Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.","status":"published","published":"2026-09-18T17:21:18.217Z","modified":"2026-10-28T11:18:18.595183641Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:45:12.933503Z"},{"id":"DEBIAN-CVE-2026-61550","description":"Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.","status":"published","published":"2026-09-18T18:17:08.217Z","modified":"2026-09-25T08:47:24.523114929Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"UBUNTU-CVE-2026-61550","description":"Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.","status":"published","published":"2026-09-18T18:17:00Z","modified":"2026-11-04T20:04:21.032147099Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-04T21:43:41.994988Z"}]}}