High severity7.1NVD Advisory· Published Jul 8, 2026· Updated Jul 13, 2026
CVE-2026-58213
CVE-2026-58213
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.
Affected products
1Patches
Vulnerability mechanics
References
8- github.com/nats-io/nats-server/commit/366837cfc65ab9ccb4f98193c65e8daf238582d8nvdPatch
- github.com/nats-io/nats-server/commit/64ebae40051ee497c481e10f316238faf0de1736nvdPatch
- github.com/nats-io/nats-server/commit/f14856b9e57a36818f43851cb69b6e33670885c9nvdPatch
- github.com/nats-io/nats-server/pull/8163nvdIssue TrackingPatch
- github.com/nats-io/nats-server/pull/8164nvdIssue TrackingPatch
- github.com/nats-io/nats-server/security/advisories/GHSA-qrcv-3558-gj4fnvdVendor Advisory
- github.com/nats-io/nats-server/releases/tag/v2.12.9nvdRelease Notes
- github.com/nats-io/nats-server/releases/tag/v2.14.1nvdRelease Notes
News mentions
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