Vulnerability · Published Oct 28, 2026 · Assigned by VulnCheck
CVE-2026-118690Signal K Server before 2.33.0 Missing Authentication via /skServer/ziplogs
Critical 9.8
In plain English
A critical-severity missing authentication in signalk-server from SignalK. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 47.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SignalK | signalk-server | 0 – before 2.33.0 |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- Patch Commit patch
- https://github.com/SignalK/signalk-server product
- GitHub Security Advisory (GHSA-4w32-qx5g-cpwv) vendor-advisory
- https://github.com/SignalK/signalk-server/blob/v2.32.0/src/interfaces/logfiles.js#L30-L91 technical-description
- signalk-server v2.33.0 Release Notes release-notes
- VulnCheck Advisory: Signal K Server before 2.33.0 Missing Authentication via /skServer/ziplogs third-party-advisory