CVE-2026-58207

medium

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.

References

https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2

https://github.com/nats-io/nats-server/releases/tag/v2.14.3

https://github.com/nats-io/nats-server/releases/tag/v2.12.12

https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3

https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9

Details

Source: Mitre, NVD

Published: 2026-07-08

Updated: 2026-07-09

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00548