{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41893", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-22T15:11:54.671Z", "datePublished": "2026-05-09T19:12:10.082Z", "dateUpdated": "2026-05-14T17:50:55.289Z"}, "containers": {"cna": {"title": "Signal K Server's WebSocket Login Endpoint Lacks Rate Limiting (Credential Brute-Force)", "problemTypes": [{"descriptions": [{"cweId": "CWE-307", "lang": "en", "description": "CWE-307: Improper Restriction of Excessive Authentication Attempts", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g"}, {"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": "2026-05-09T19:12:10.082Z"}, "descriptions": [{"lang": "en", "value": "Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.25.0, the HTTP login endpoints (POST /login and POST /signalk/v1/auth/login) are protected by express-rate-limit (default: 100 attempts per 10-minute window, configurable via HTTP_RATE_LIMITS). The WebSocket login path \u2014 sending {login: {username, password}} messages over an established WebSocket connection \u2014 calls app.securityStrategy.login() directly without any rate limiting. An attacker can bypass HTTP rate limiting entirely by opening a WebSocket connection and attempting unlimited password guesses at the speed bcrypt allows (~20 attempts/sec with 10 salt rounds). This issue has been patched in version 2.25.0."}], "source": {"advisory": "GHSA-vmfm-ch9h-5c7g", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-14T17:50:07.187900Z", "id": "CVE-2026-41893", "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": "2026-05-14T17:50:55.289Z"}}]}}

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