{"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"}}]}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-39320", "lastModified": "2026-04-21T16:20:24.180", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-21T01:16:05.063", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d"}, {"source": "security-advisories@github.com", "url": "https://github.com/SignalK/signalk-server/pull/2568"}, {"source": "security-advisories@github.com", "url": "https://github.com/SignalK/signalk-server/releases/tag/v2.25.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-7gcj-phff-2884"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-1333"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.25.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "signalk-server", "source": "cna", "vendor": "SignalK"}, "product": "signalk-server", "vendor": "signalk"}], "created": "2026-04-21T02:30:25.670195+00:00", "updated": "2026-04-21T02:30:25.670230+00:00", "vendors": ["signalk", "signalk$PRODUCT$signalk-server"]}