EUVD-2026-42389

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, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal...

GHSA-PQ2Q-RCW4-3HR6 NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead

Background NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing. When using WebSockets, a malicious client can trigger a server crash with crafted frames, before authentication. Problem Description A missi...