Vulnerability Description
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Nats-Server | < 2.11.16 |
Related Weaknesses (CWE)
References
- https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce0Patch
- https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b7Patch
- https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9Patch
- https://github.com/nats-io/nats-server/releases/tag/v2.11.16Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.12.7Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.14.0Release Notes
- https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhrVendor Advisory
FAQ
What is CVE-2026-58252?
CVE-2026-58252 is a vulnerability with a CVSS score of 6.5 (MEDIUM). NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user could receive messages on denied subjects ...
How severe is CVE-2026-58252?
CVE-2026-58252 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-58252?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Nats-Server.