CVE-2026-58207

NATS Server: Remote crash via integer overflow in Connz pagination

Published: Jul 8, 2026Updated: Jul 9, 2026 Sources: CVE List NVDCWE-190

7.7HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

Open in CVSS calculator →

Weaknesses

CWE-190

Affected Products

linuxfoundation

oss-project·USaka everest, pytorch, yocto

nats-serverOn-premDatabase

AI / ML / vector-db-rag

nats-io

oss-project

nats-serverOn-prem

Databases / cache-message-queue

Exploitability

Official Patch Available

Workaround Available

Is your org exposed to CVE-2026-58207?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique

Initial Access

View detailed technique mapping

References

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

github.com

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

github.com

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

github.com

and 2 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-58207 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows