Critical severity · published Oct 28, 2026
CVE-2026-118690
Signal K Server before 2.33.0 Missing Authentication via /skServer/ziplogs
New
9.8
CVSS
–
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
signalk-server · SignalK
before 2.33.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-118690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-118690
github.com
https://github.com/SignalK/signalk-server
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/commit/728bab82742d16c54e50525b95dc9b6e32396107
github.com
https://github.com/SignalK/signalk-server/releases/tag/v2.33.0
github.com
https://github.com/SignalK/signalk-server/security/advisories/GHSA-4w32-qx5g-cpwv
www.vulncheck.com
https://www.vulncheck.com/advisories/signal-k-server-before-2.33.0-missing-authentication-via-skserver-ziplogs
More from signalk-server
9.4
CVE-2026-33950
signalk-server: Privilege Escalation by Admin Role Injection via /enableSecurity
9.1
CVE-2025-68620
Signal K Server vulnerable to JWT Token Theft via WebSocket Enumeration and Unauthenticated Polling
8.8
CVE-2026-23515
RCE - Command Injection in Signal K set-system-time plugin
8.8
CVE-2025-69203
Signal K Server Vulnerable to Access Request Spoofing
8.8
CVE-2025-66398
Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)