CVE-2026-41893

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-41893
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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d Patch
https://github.com/SignalK/signalk-server/pull/2568 Issue Tracking Patch
https://github.com/SignalK/signalk-server/releases/tag/v2.25.0 Product Release Notes
https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g Exploit Mitigation Vendor Advisory
https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g Exploit Mitigation Vendor Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*
History

15 May 2026, 19:14

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
CPE cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*
First Time Signalk
Signalk signal K Server
References () https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d - () https://github.com/SignalK/signalk-server/commit/215d81eb700d5419c3396a0fbf23f2e246dfac2d - Patch
References () https://github.com/SignalK/signalk-server/pull/2568 - () https://github.com/SignalK/signalk-server/pull/2568 - Issue Tracking, Patch
References () https://github.com/SignalK/signalk-server/releases/tag/v2.25.0 - () https://github.com/SignalK/signalk-server/releases/tag/v2.25.0 - Product, Release Notes
References () https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g - () https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g - Exploit, Mitigation, Vendor Advisory

14 May 2026, 18:16

Type Values Removed Values Added
References () https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g - () https://github.com/SignalK/signalk-server/security/advisories/GHSA-vmfm-ch9h-5c7g -

09 May 2026, 20:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-09 20:16

Updated : 2026-05-15 19:14

NVD link : CVE-2026-41893

Mitre link : CVE-2026-41893

CVE.ORG link : CVE-2026-41893

JSON object : View

Products Affected

signalk

  • signal_k_server
CWE
CWE-307

Improper Restriction of Excessive Authentication Attempts