CVE-2026-58213
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.
Weakness
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.
Affected products
- linuxfoundation nats-server
References
- https://github.com/nats-io/nats-server/commit/366837cfc65ab9ccb4f98193c65e8daf238582d8
- https://github.com/nats-io/nats-server/commit/64ebae40051ee497c481e10f316238faf0de1736
- https://github.com/nats-io/nats-server/commit/f14856b9e57a36818f43851cb69b6e33670885c9
- https://github.com/nats-io/nats-server/pull/8163
- https://github.com/nats-io/nats-server/pull/8164
- https://github.com/nats-io/nats-server/releases/tag/v2.12.9
Find the bug before an attacker does.
Sign in with GitHub and run your first audit in under a minute. The free plan needs no credit card.