CVE-2026-58214

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{"affected": [{"affectedData": [{"product": "nats-server", "vendor": "nats-io", "versions": [{"status": "affected", "version": "< 2.12.12"}, {"status": "affected", "version": ">= 2.14.0-RC.1, < 2.14.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*", "matchCriteriaId": "3662387F-C5A6-478A-94D1-849E3C7E81DB", "versionEndExcluding": "2.12.12", "vulnerable": true}, {"criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*", "matchCriteriaId": "9BF70729-64AF-4219-BC35-3C5C042F0595", "versionEndExcluding": "2.14.3", "versionStartIncluding": "2.14.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}, {"lang": "es", "value": "NATS Server es un servidor de alto rendimiento para NATS.io, el sistema de mensajer\u00eda nativo de la nube y del borde. Antes de las versiones 2.14.3 y 2.12.12, un cliente MQTT autenticado pod\u00eda suscribirse a la familia de asuntos internos $MQTT.deliver.pubrel, eludiendo los permisos de suscripci\u00f3n configurados y exponiendo metadatos del protocolo MQTT QoS2 para sesiones en la cuenta. Este problema est\u00e1 solucionado en las versiones 2.14.3 y 2.12.12."}], "id": "CVE-2026-58214", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-58214", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-09T13:32:18.907165Z", "version": "2.0.3"}}]}, "published": "2026-07-08T20:16:54.347", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/nats-io/nats-server/commit/297b166be60fe13144084eed4b25201ead03204a"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/nats-io/nats-server/commit/34b09657bb596d5f850eaa5cfc97ea6b2f989a97"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.12"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.3"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-4g68-3pwx-5vfj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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