CVE-2026-58213
HIGH
NVD
CVSS Score
7.1
Severity
HIGH
Published
Jul 08, 2026
Vendor
unknown
Description
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.
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