{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-58214","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-29T17:09:25.873Z","datePublished":"2026-07-08T20:06:34.794Z","dateUpdated":"2026-07-09T13:32:36.057Z"},"containers":{"cna":{"title":"NATS Server: MQTT subscribe ACL bypass via $MQTT.deliver.pubrel prefix (incomplete fix for CVE-2026-33217)","problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/nats-io/nats-server/security/advisories/GHSA-4g68-3pwx-5vfj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-4g68-3pwx-5vfj"},{"name":"https://github.com/nats-io/nats-server/commit/297b166be60fe13144084eed4b25201ead03204a","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/commit/297b166be60fe13144084eed4b25201ead03204a"},{"name":"https://github.com/nats-io/nats-server/commit/34b09657bb596d5f850eaa5cfc97ea6b2f989a97","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/commit/34b09657bb596d5f850eaa5cfc97ea6b2f989a97"},{"name":"https://github.com/nats-io/nats-server/releases/tag/v2.12.12","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.12"},{"name":"https://github.com/nats-io/nats-server/releases/tag/v2.14.3","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.3"}],"affected":[{"vendor":"nats-io","product":"nats-server","versions":[{"version":"< 2.12.12","status":"affected"},{"version":">= 2.14.0-RC.1, < 2.14.3","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-08T20:06:34.794Z"},"descriptions":[{"lang":"en","value":"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, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing configured subscribe permissions and exposing MQTT QoS2 protocol metadata for sessions in the account. This issue is fixed in versions 2.14.3 and 2.12.12."}],"source":{"advisory":"GHSA-4g68-3pwx-5vfj","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T13:32:18.907165Z","id":"CVE-2026-58214","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-09T13:32:36.057Z"}}]}}