CVE-2026-58209 (GCVE-0-2026-58209)
Vulnerability from cvelistv5
Published
2026-07-08 20:12
Modified
2026-07-09 13:31
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, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. 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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