CVEvulnerability
CVE-2026-58253
8.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-08
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L
- Weaknesses
- CWE-287
Description
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, when no_auth_user was configured, a parser fast path intended for ordinary client connections could also apply to route or leafnode listeners, allowing an unauthenticated peer to bypass inter-server CONNECT authentication and operate with the privileges associated with that connection type. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
Affected configurations
• linuxfoundation nats-server (< 2.11.16)
• linuxfoundation nats-server (>= 2.12.0 < 2.12.7)
Related
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- https://github.com/nats-io/nats-server/commit/7b81dd455ea95960090a84858c7662827948d1b6 Patch
- https://github.com/nats-io/nats-server/commit/8b8e1ad4ceed32321e00d4fc6e76be05bc13bca6 Patch
- https://github.com/nats-io/nats-server/commit/b86147e81710a52b72a7f7275f91d69f723f5cb3 Patch
- https://github.com/nats-io/nats-server/releases/tag/v2.11.16 Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.12.7 Release Notes
- https://github.com/nats-io/nats-server/releases/tag/v2.14.0 Release Notes
- https://github.com/nats-io/nats-server/security/advisories/GHSA-38x3-76xf-cq45 Vendor Advisory