{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-39320",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-06T19:31:07.266Z",
        "datePublished": "2026-04-21T00:07:10.371Z",
        "dateUpdated": "2026-04-21T19:36:54.787Z"
    },
    "containers": {
        "cna": {
            "title": "Signal K Server has an Unauthenticated Regular Expression Denial of Service (ReDoS) via WebSocket Subscription Paths",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-400",
                            "lang": "en",
                            "description": "CWE-400: Uncontrolled Resource Consumption",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1333",
                            "lang": "en",
                            "description": "CWE-1333: Inefficient Regular Expression Complexity",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "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"
                    }
                }
            ],
            "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"
                }
            ],
            "affected": [
                {
                    "vendor": "SignalK",
                    "product": "signalk-server",
                    "versions": [
                        {
                            "version": "< 2.25.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-21T00:07:10.371Z"
            },
            "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'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."
                }
            ],
            "source": {
                "advisory": "GHSA-7gcj-phff-2884",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-7gcj-phff-2884",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-21T19:36:30.279521Z",
                                "id": "CVE-2026-39320",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-21T19:36:54.787Z"
                }
            }
        ]
    }
}