Vulnerability Details CVE-2026-58207
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 42.7%
CVSS Severity
CVSS v3 Score 7.7
References
- https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9
- https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3
- https://github.com/nats-io/nats-server/releases/tag/v2.12.12
- https://github.com/nats-io/nats-server/releases/tag/v2.14.3
- https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2
Products affected by CVE-2026-58207
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cpe:2.3:a:linuxfoundation:nats-server:2.12.0
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cpe:2.3:a:linuxfoundation:nats-server:2.12.1
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cpe:2.3:a:linuxfoundation:nats-server:2.12.10
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cpe:2.3:a:linuxfoundation:nats-server:2.12.11
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cpe:2.3:a:linuxfoundation:nats-server:2.12.2
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cpe:2.3:a:linuxfoundation:nats-server:2.12.3
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cpe:2.3:a:linuxfoundation:nats-server:2.12.4
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cpe:2.3:a:linuxfoundation:nats-server:2.12.5
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cpe:2.3:a:linuxfoundation:nats-server:2.12.6
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cpe:2.3:a:linuxfoundation:nats-server:2.12.7
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cpe:2.3:a:linuxfoundation:nats-server:2.12.8
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cpe:2.3:a:linuxfoundation:nats-server:2.12.9
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cpe:2.3:a:linuxfoundation:nats-server:2.14.0
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cpe:2.3:a:linuxfoundation:nats-server:2.14.1
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cpe:2.3:a:linuxfoundation:nats-server:2.14.2