{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "signalk-server",
          "vendor": "SignalK",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.25.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s Node.js event loop into a catastrophic backtracking loop when evaluating long string identifiers (like the server\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1333",
              "description": "CWE-1333: Inefficient Regular Expression Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-21T00:07:10.371Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-7gcj-phff-2884",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-7gcj-phff-2884"
        },
        {
          "name": "https://github.com/SignalK/signalk-server/pull/2568",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/SignalK/signalk-server/pull/2568"
        },
        {
          "name": "https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d"
        },
        {
          "name": "https://github.com/SignalK/signalk-server/releases/tag/v2.25.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/SignalK/signalk-server/releases/tag/v2.25.0"
        }
      ],
      "source": {
        "advisory": "GHSA-7gcj-phff-2884",
        "discovery": "UNKNOWN"
      },
      "title": "Signal K Server has an Unauthenticated Regular Expression Denial of Service (ReDoS) via WebSocket Subscription Paths"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-39320",
    "datePublished": "2026-04-21T00:07:10.371Z",
    "dateReserved": "2026-04-06T19:31:07.266Z",
    "dateUpdated": "2026-04-21T00:07:10.371Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}