{"id":"CVE-2026-58209","aliases":["AZL-92256","BIT-nats-2026-58209","DEBIAN-CVE-2026-58209","EUVD-2026-42347","GHSA-7qmq-8cc4-hxwg","JLSEC-2026-1146","RHSA-2026:36016","RHSA-2026:36017","UBUNTU-CVE-2026-58209"],"status":"published","title":"NATS Server: MQTT retained and QoS replay bypass subscribe deny filters","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00342,"percentile":0.28,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-863"],"published":"2026-07-08T20:12:11Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Azure Linux:3","package":"telegraf","fixed_in":["1.31.0-27"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"nats","fixed_in":["2.12.12","2.14.3"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"nats-server","fixed_in":["2.14.3-1"],"sources":["osv"]},{"ecosystem":"Julia","package":"nats_server_jll","fixed_in":["2.14.3+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure 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Hat:hummingbird:1","package":"nats-server2.14","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.14.3-1.hum1"}]}],"bundled":6},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"nats-server2.12","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.12.12-1.hum1"}]}],"bundled":6},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"nats-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.9.19-1build1","2.10.3-1","2.10.4-1","2.10.7-1","2.10.7-1ubuntu0.1","2.10.7-1ubuntu0.2","2.10.7-1ubuntu0.3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"nats-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.24-1","2.10.27-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"nats-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.27-1build1","2.14.1-1","2.14.3-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"nats-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.27-1","2.10.27-1build1","2.10.27-1ubuntu0.26.04.1~esm1"]}],"products":[{"vendor":"linuxfoundation","product":"nats-server"},{"vendor":"nats-io","product":"nats-server"}],"references":[{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-7qmq-8cc4-hxwg","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web","article","report"]},{"url":"https://github.com/nats-io/nats-server/commit/181b1f51f40b9954c57e9d478e051fb257679356","tags":["x_refsource_MISC","Patch","fix","web","article"]},{"url":"https://github.com/nats-io/nats-server/commit/1c429b6fdc5afd4188cc5faf1127f6334896cd87","tags":["x_refsource_MISC","Patch","fix","web","article"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.12","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.3","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58209","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58209.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-58209","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36016","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-58213","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-58210","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-58211","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-58209","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-58214","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-58254","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_36016.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2498259","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58209","tags":["advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2498247","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58210","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58210","tags":["advisory"]},{"url":"https://github.com/nats-io/nats-server/commit/bce9ef39469e610aeddb819194ceb7f7edfc0861","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/commit/e016e47bbf70304945f2ae9dc397e4862adefaf5","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-r72h-j7qq-v6qg","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2498258","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58211","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58211","tags":["advisory"]},{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-hmmp-q8cx-v964","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2498249","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58213","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58213","tags":["advisory"]},{"url":"https://github.com/nats-io/nats-server/commit/366837cfc65ab9ccb4f98193c65e8daf238582d8","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/commit/64ebae40051ee497c481e10f316238faf0de1736","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/commit/f14856b9e57a36818f43851cb69b6e33670885c9","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/pull/8163","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/pull/8164","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.9","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.1","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-qrcv-3558-gj4f","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2498260","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58214","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58214","tags":["advisory"]},{"url":"https://github.com/nats-io/nats-server/commit/297b166be60fe13144084eed4b25201ead03204a","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/commit/34b09657bb596d5f850eaa5cfc97ea6b2f989a97","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-4g68-3pwx-5vfj","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2498266","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58254","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58254","tags":["advisory"]},{"url":"https://github.com/nats-io/nats-server/commit/cbe845932980b71563efac5cfa4cc751c88936cd","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.8","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-p3j5-5hrq-p75h","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2026:36017","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_36017.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-58209","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-58209","title":"NATS Server: MQTT retained and QoS replay bypass subscribe deny filters","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.","status":"published","published":"2026-07-08T20:12:11.24Z","modified":"2026-07-09T13:31:07.445Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T13:47:39.876248Z"}],"euvd":[{"id":"EUVD-2026-42347","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. 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Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.","status":"published","published":"2026-07-08T20:16:53.8Z","modified":"2026-10-26T12:02:36.335140227Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:57.590991Z"},{"id":"JLSEC-2026-1146","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.","status":"published","published":"2026-08-03T19:08:57.739Z","modified":"2026-08-03T19:15:07.380949227Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:47:18.159338Z"},{"id":"RHSA-2026:36016","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-22T10:22:44Z","modified":"2026-09-06T10:13:15Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:19.963895Z"},{"id":"RHSA-2026:36017","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-22T10:22:45Z","modified":"2026-09-08T10:12:58Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:19.963895Z"},{"id":"UBUNTU-CVE-2026-58209","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. 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Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.","status":"published","published":"2026-07-08T20:16:53Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:25.880689Z"},{"id":"BIT-nats-2026-58209","title":"NATS Server: MQTT retained and QoS replay bypass subscribe deny filters","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.","status":"published","published":"2026-07-14T15:47:11.862Z","modified":"2026-09-29T10:00:07.099999314Z","updated_at":"2026-11-02T15:28:34.007508Z"}]}}