High severity7.5NVD Advisory· Published Jul 8, 2026· Updated Jul 13, 2026
CVE-2026-58210
CVE-2026-58210
Description
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 unauthenticated MQTT client could cause the server to retain large incomplete MQTT CONNECT packets before authentication completed, consuming server memory while the parser waited for the advertised MQTT packet length. This issue is fixed in versions 2.14.3 and 2.12.12.
Affected products
1Patches
Vulnerability mechanics
References
5- github.com/nats-io/nats-server/commit/bce9ef39469e610aeddb819194ceb7f7edfc0861nvdPatch
- github.com/nats-io/nats-server/commit/e016e47bbf70304945f2ae9dc397e4862adefaf5nvdPatch
- github.com/nats-io/nats-server/security/advisories/GHSA-r72h-j7qq-v6qgnvdVendor Advisory
- github.com/nats-io/nats-server/releases/tag/v2.12.12nvdRelease Notes
- github.com/nats-io/nats-server/releases/tag/v2.14.3nvdRelease Notes
News mentions
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