Vulnerability from bitnami_vulndb
Published
2026-07-14 15:47
Modified
2026-09-29 09:14
Summary
NATS Server: Route API Auth Bypass
Details

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.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "nats",
        "purl": "pkg:bitnami/nats"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.16"
            },
            {
              "introduced": "2.12.0"
            },
            {
              "fixed": "2.12.6"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-58253"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:nats:nats_server:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:nats:nats_server:*:*:*:*:*:go:*:*"
    ],
    "severity": "High"
  },
  "details": "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.",
  "id": "BIT-nats-2026-58253",
  "modified": "2026-09-29T09:14:51.928Z",
  "published": "2026-07-14T15:47:19.103Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/7b81dd455ea95960090a84858c7662827948d1b6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/8b8e1ad4ceed32321e00d4fc6e76be05bc13bca6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nats-io/nats-server/commit/b86147e81710a52b72a7f7275f91d69f723f5cb3"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.11.16"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.7"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-38x3-76xf-cq45"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58253"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "NATS Server: Route API Auth Bypass"
}



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