{
  "cveId": "CVE-2026-33248",
  "url": "https://patchblox.com/security/cve/CVE-2026-33248",
  "summary": "CVE-2026-33248 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-33248, released March 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "nats-server: NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system",
  "description": "NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using mTLS for client identity, with \u0060verify_and_map\u0060 to derive a NATS identity from the client certificate\u0027s Subject DN, certain patterns of RDN would not be correctly enforced, allowing for authentication bypass. This does require a valid certificate from a CA already trusted for client certificates, and \u0060DN\u0060 naming patterns which the NATS maintainers consider highly unlikely. So this is an unlikely attack. Nonetheless, administrators who have been very sophisticated in their \u0060DN\u0060 construction patterns might conceivably be impacted. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, developers should review their CA issuing practices.",
  "published": "2026-03-25T21:16:47Z",
  "severity": "medium",
  "cvss": 4.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
  "epss": 0.00149,
  "epssPercentile": 0.0411,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "govulncheck-vulndb",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "0.0.20260326T203309-150000.1.155.2",
      "fix": "SUSE-SU-2026:1135-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1135-1",
      "released": "2026-03-27T17:33:48Z"
    },
    {
      "platform": "linux",
      "product": "govulncheck-vulndb",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.0.20260723T184607-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21483-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21483-1",
      "released": "2026-07-30T09:09:47Z"
    },
    {
      "platform": "linux",
      "product": "nats-server",
      "release": "Debian 14",
      "fixedVersion": "2.12.6-1",
      "fix": "DEBIAN-CVE-2026-33248",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33248",
      "released": "2026-03-25T21:16:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}