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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/nats-io/nats-server/commit/181b1f51f40b9954c57e9d478e051fb257679356 Patch
- https://github.com/nats-io/nats-server/commit/1c429b6fdc5afd4188cc5faf1127f6334896cd87 Patch
- https://github.com/nats-io/nats-server/security/advisories/GHSA-7qmq-8cc4-hxwg Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 4.3 · linuxfoundationNVD modified 2026-10-25 17:10
Affected (CPE criteria) 1
cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*
References 5
- https://github.com/nats-io/nats-server/commit/181b1f51f40b9954c57e9d478e051fb257679356 Patch
- https://github.com/nats-io/nats-server/commit/1c429b6fdc5afd4188cc5faf1127f6334896cd87 Patch
- https://github.com/nats-io/nats-server/releases/tag/v2.12.12 Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.14.3 Release Notes
- https://github.com/nats-io/nats-server/security/advisories/GHSA-7qmq-8cc4-hxwg Vendor Advisory