{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.25.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "aa78c4bc7071635d2c06ad036ce32c2c55b86674"
            },
            {
              "fixed": "215d81eb700d5419c3396a0fbf23f2e246dfac2d"
            },
            {
              "fixed": "9fec95f4386404cd311c9a445065513871ad9aa8"
            }
          ],
          "repo": "https://github.com/signalk/signalk-server",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7gcj-phff-2884"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1333",
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39320.json"
  },
  "details": "Signal K Server is a server application that runs on a central hub in a boat. Versions prior to 2.25.0 are vulnerable to an unauthenticated Regular Expression Denial of Service (ReDoS) attack within the WebSocket subscription handling logic. By injecting unescaped regex metacharacters into the `context` parameter of a stream subscription, an attacker can force the server's Node.js event loop into a catastrophic backtracking loop when evaluating long string identifiers (like the server's self UUID). This results in a total Denial of Service (DoS) where the server CPU spikes to 100% and becomes completely unresponsive to further API or socket requests. Version 2.25.0 contains a fix.",
  "id": "CVE-2026-39320",
  "modified": "2026-09-10T11:30:19.679475230Z",
  "published": "2026-04-21T00:07:10.371Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/SignalK/signalk-server/releases/tag/v2.25.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39320.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-7gcj-phff-2884"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39320"
    },
    {
      "type": "FIX",
      "url": "https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d"
    },
    {
      "type": "FIX",
      "url": "https://github.com/SignalK/signalk-server/pull/2568"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Signal K Server has an Unauthenticated Regular Expression Denial of Service (ReDoS) via WebSocket Subscription Paths"
}