by Kastro
Paper/Archive/CVE-2026-118690

CVE-2026-118690

SignalK signalk-server — Signal K Server before 2.33.0 Missing Authentication via /skServer/ziplogs

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 52.6.526 × 2010.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
signalk-server< 2.33.02.33.0CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchgithub.com/SignalK/signalk-server/commit/728bab82742d16c54e50525b95dc9b6e32396107refgithub.com/SignalK/signalk-serveradvisorygithub.com/SignalK/signalk-server/security/advisories/GHSA-4w32-qx5g-cpwvwriteupgithub.com/SignalK/signalk-server/blob/v2.32.0/src/interfaces/logfiles.js#L30-L91refgithub.com/SignalK/signalk-server/releases/tag/v2.33.0writeupvulncheck.com/advisories/signal-k-server-before-2.33.0-missing-authentication-via-skserver-ziplogs