CVE-2026-58207

HIGH

NATS Server: Remote crash via integer overflow in Connz pagination

Title source: cna
STIX 2.1

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 (5)

Core 5

Scores

CVSS v3 7.7
EPSS 0.0056
EPSS Percentile 42.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-190
Status published
Products (3)
linuxfoundation/nats-server 2.12.0 - 2.12.12
nats-io/nats-server < 2.12.12
nats-io/nats-server >= 2.14.0-RC.1, < 2.14.3
Published Jul 08, 2026
Tracked Since Jul 09, 2026