CVE-2026-58213
Fixed in a distro release EPSS <1%CVSS 7.1
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as NATS protocol data to route or leafnode connections, corrupting the forwarded protocol stream and allowing injection of unintended NATS protocol operations. This issue is fixed in versions 2.14.1 and 2.12.9.
Products: nats-io nats-server
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | nats-server | no fix |
| Debian 13 | nats-server | no fix |
| Debian 14 | nats-server | 2.14.1-1 |
| Red Hat hummingbird 1 | nats-server2.12 | 0:2.12.12-1.hum1 |
| Red Hat hummingbird 1 | nats-server2.14 | 0:2.14.3-1.hum1 |
| Ubuntu 24.04 LTS | nats-server | no fix |
| Ubuntu 25.10 | nats-server | no fix |
| Ubuntu Pro 26.04 LTS | nats-server | no fix |