CVE-2026-118690

CRITICAL 9.8

Signal K Server before 2.33.0 Missing Authentication via /skServer/ziplogs

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Signal K Server before 2.33.0 contains a missing authentication vulnerability that allows unauthenticated remote attackers to download log archives via the /skServer/ziplogs endpoint. Attackers can extract the JWT secretKey from security.json in the ZIP, forge administrator tokens, and create persistent admin accounts for full server control.

CWE	CWE-306
Vendor	signalk
Product	signalk-server
Published	Oct 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

SignalK / signalk-server

0 < 2.33.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/SignalK/signalk-server/commit/728bab82742d16c54e50525b95dc9b6e32396107 github.com: https://github.com/SignalK/signalk-server github.com: https://github.com/SignalK/signalk-server/security/advisories/GHSA-4w32-qx5g-cpwv github.com: https://github.com/SignalK/signalk-server/blob/v2.32.0/src/interfaces/logfiles.js#L30-L91 github.com: https://github.com/SignalK/signalk-server/releases/tag/v2.33.0 vulncheck.com: https://www.vulncheck.com/advisories/signal-k-server-before-2.33.0-missing-authentication-via-skserver-ziplogs

Credits

tkurki Taqiyuddin Anas