{"id":"CVE-2026-58254","aliases":["BIT-nats-2026-58254","DEBIAN-CVE-2026-58254","EUVD-2026-42386","GHSA-p3j5-5hrq-p75h","JLSEC-2026-1154","RHSA-2026:36016","RHSA-2026:36017","UBUNTU-CVE-2026-58254"],"status":"published","title":"NATS Server: Incomplete fix for CVE-2026-33249: Leaf node connections bypass Nats-Trace-Dest permission check","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00308,"percentile":0.23935,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-863"],"published":"2026-07-08T19:56:58Z","modified":"2026-10-28T02:30:42Z","fixes":[{"ecosystem":"Bitnami","package":"nats","fixed_in":["2.12.8","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":"Bitnami","package":"nats","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.12.8"},{"introduced":"2.14.0"},{"fixed":"2.14.3"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"nats-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.1-1","2.10.16-1","2.10.18-1","2.10.24-1","2.10.27-1","2.10.3-1","2.10.4-1","2.10.7-1","2.12.4-1","2.12.6-1","2.14.1-1","2.14.3-1","2.14.6-1","2.15.1-1","2.9.10-1","2.9.19-1"]},{"source":"osv","ecosystem":"Debian:13","package":"nats-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.27-1","2.12.4-1","2.12.6-1","2.14.1-1","2.14.3-1","2.14.6-1","2.15.1-1"]},{"source":"osv","ecosystem":"Debian:14","package":"nats-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14.3-1"}]}],"versions":["2.10.27-1","2.12.4-1","2.12.6-1","2.14.1-1"]},{"source":"osv","ecosystem":"Julia","package":"nats_server_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.14.3+0"}]}]},{"source":"osv","ecosystem":"Red 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-p3j5-5hrq-p75h","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web","article","report"]},{"url":"https://github.com/nats-io/nats-server/commit/cbe845932980b71563efac5cfa4cc751c88936cd","tags":["x_refsource_MISC","Patch","fix","web","article"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.8","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-2026-58254","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58254.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-58254","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"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58209","tags":["advisory"]},{"url":"https://github.com/nats-io/nats-server/commit/181b1f51f40b9954c57e9d478e051fb257679356","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/commit/1c429b6fdc5afd4188cc5faf1127f6334896cd87","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.12","tags":["article"]},{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-7qmq-8cc4-hxwg","tags":["article"]},{"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","report"]},{"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-2026-58254","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-58254","title":"NATS 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Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.","status":"published","published":"2026-07-08T19:56:58.311Z","modified":"2026-07-09T13:38:17.588Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T13:47:28.691429Z"}],"euvd":[{"id":"EUVD-2026-42386","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.","status":"published","published":"2026-07-08T19:56:58Z","modified":"2026-07-09T13:38:17Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:04.523855Z"}],"nvd":[{"id":"CVE-2026-58254","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 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.","status":"published","published":"2026-07-08T20:16:55.107Z","modified":"2026-10-26T12:02:37.090577153Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:57.590991Z"},{"id":"JLSEC-2026-1154","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.","status":"published","published":"2026-08-03T19:08:57.739Z","modified":"2026-08-03T19:15:08.690002718Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","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-2026-58254","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. 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This issue is fixed in versions 2.14.3 and 2.12.8.","status":"published","published":"2026-07-08T20:16:00Z","modified":"2026-10-17T12:59:13.504763193Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:56:41.911783Z"},{"id":"BIT-nats-2026-58254","title":"NATS Server: Incomplete fix for CVE-2026-33249: Leaf node connections bypass Nats-Trace-Dest permission check","description":"NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.","status":"published","published":"2026-07-14T15:47:20.041Z","modified":"2026-09-29T10:00:04.765339593Z","updated_at":"2026-11-02T15:28:34.007508Z"}]}}