CVE-2026-58250

Published: Jul 8, 2026Modified: Jul 13, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

Description

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.

Affected (2)

Products: Linuxfoundation: Nats Server

Linuxfoundation

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Linuxfoundation Nats Server	Before 2.11.17
Linuxfoundation Nats Server	From 2.12.0 to 2.12.8

Related CWEs

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

References (5)

https://github.com/nats-io/nats-server/commit/8dcb26eaea78fdcbe96dbee5986d6019fd5cb94a

Source: security-advisories@github.com

Patch

https://github.com/nats-io/nats-server/commit/fc5fe39177533e9dbdd651d2458285bfae1dde27

Source: security-advisories@github.com

Patch

https://github.com/nats-io/nats-server/releases/tag/v2.11.17

Source: security-advisories@github.com

Release Notes

https://github.com/nats-io/nats-server/releases/tag/v2.12.8

Source: security-advisories@github.com

Release Notes

https://github.com/nats-io/nats-server/security/advisories/GHSA-3g5q-cfh2-cq67

Source: security-advisories@github.com

Vendor Advisory

Timeline

No history available yet.