{"id":"UBUNTU-CVE-2026-33217","details":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using ACLs on message subjects, these ACLs were not applied in the `$MQTT.\u003e` namespace, allowing MQTT clients to bypass ACL checks for MQTT subjects. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.","modified":"2026-07-02T18:02:51.277095408Z","published":"2026-03-25T20:16:00Z","upstream":["CVE-2026-33217"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33217"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-33217"},{"type":"REPORT","url":"https://advisories.nats.io/CVE/secnote-2026-07.txt"},{"type":"REPORT","url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-jxxm-27vp-c3m5"}],"affected":[{"package":{"name":"nats-server","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nats-server?arch=source&distro=noble"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-nats-io-nats-server-dev","binary_version":"2.10.7-1ubuntu0.3"},{"binary_name":"nats-server","binary_version":"2.10.7-1ubuntu0.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33217.json"}},{"package":{"name":"nats-server","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/nats-server?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.24-1","2.10.27-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-nats-io-nats-server-dev","binary_version":"2.10.27-1"},{"binary_name":"nats-server","binary_version":"2.10.27-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33217.json"}},{"package":{"name":"nats-server","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/nats-server?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.27-1","2.10.27-1build1","2.10.27-1ubuntu0.26.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.10.27-1ubuntu0.26.04.1~esm1","binary_name":"golang-github-nats-io-nats-server-dev"},{"binary_name":"nats-server","binary_version":"2.10.27-1ubuntu0.26.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33217.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}