NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.
Metrics
Affected Vendors & Products
References
History
Fri, 10 Jul 2026 09:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Nats
Nats nats Server |
|
| Vendors & Products |
Nats
Nats nats Server |
Thu, 09 Jul 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 08 Jul 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8. | |
| Title | NATS Server: Incomplete fix for CVE-2026-33249: Leaf node connections bypass Nats-Trace-Dest permission check | |
| Weaknesses | CWE-863 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-07-08T19:56:58.311Z
Updated: 2026-07-09T13:38:17.588Z
Reserved: 2026-06-29T21:54:30.330Z
Link: CVE-2026-58254
Updated: 2026-07-09T13:38:10.319Z
No data.
No data.