CVE-2026-58207
High
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.
SeverityHigh
CVSS7.7
Exploit probability—
ProductLinuxfoundation Nats-server
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- linuxfoundation nats-server2.12.12, 2.14.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation nats-server | 2.12.0 ≤ v < 2.12.12, 2.14.0 ≤ v < 2.14.3 | 2.12.12, 2.14.3 |
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