{"cve":"CVE-2026-41893","nvd":{"published":"2026-05-09T20:16:27.273","modified":"2026-07-24T19:10:00.160","status":"Analyzed","description":"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 — sending {login: {username, password}} messages over an established WebSocket connection — 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.","cvss_v4":{"vector":"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","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-307"],"references":["https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d","https://github.com/SignalK/signalk-server/pull/2568","https://github.com/SignalK/signalk-server/releases/tag/v2.25.0","https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g","https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g"],"products":["signalk:signal_k_server"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-41893","score":0.00327,"percentile":0.25798,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vmfm-ch9h-5c7g","url":"https://osv.dev/vulnerability/GHSA-vmfm-ch9h-5c7g","summary":"Signal K Server's WebSocket Login Endpoint Lacks Rate Limiting (Credential Brute-Force)","modified":"2026-05-13T13:47:18.329474Z","packages":[{"ecosystem":"npm","name":"signalk-server","purl":"pkg:npm/signalk-server","ranges":["<2.25.0"],"fixed":["2.25.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}