CVE-2026-58214 (GCVE-0-2026-58214)
Vulnerability from cvelistv5
Published
2026-07-08 20:06
Modified
2026-07-09 13:32
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-863 - Incorrect Authorization
Summary
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.
References
Impacted products
Vendor Product Version
nats-io nats-server Version: < 2.12.12
Version: >= 2.14.0-RC.1, < 2.14.3
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