Vulnerability Description
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal arithmetic before the response window was safely bounded. This issue is fixed in versions 2.14.3 and 2.12.12.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Nats-Server | >= 2.12.0, < 2.12.12 |
Related Weaknesses (CWE)
References
- https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39Patch
- https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dPatch
- https://github.com/nats-io/nats-server/releases/tag/v2.12.12Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.14.3Release Notes
- https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2MitigationVendor Advisory
FAQ
What is CVE-2026-58207?
CVE-2026-58207 is a vulnerability with a CVSS score of 7.7 (HIGH). NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could...
How severe is CVE-2026-58207?
CVE-2026-58207 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-58207?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Nats-Server.