CVE-2026-58207: Linuxfoundation Nats-Server

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Linuxfoundation Nats-Server: from 2.12.0, before 2.12.12 (fixed in 2.12.12); from 2.14.0, before 2.14.3 (fixed in 2.14.3)

Published 2026-07-08. Last modified 2026-07-09.