CVE-2026-118690 json
Signal K Server before 2.33.0 Missing Authentication via /skServer/ziplogs
published 2026-10-28 11 d ago modified 2026-10-29 10 d ago also EUVD-2026-112491
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 52%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- SignalK signalk-server 2.33.0
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 10 d ago
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- SignalK signalk-server
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
-
github.com
/SignalK/signalk-server/commit/728bab82742d16c54e50525b95dc9b6e32396107
patch
-
github.com
/SignalK/signalk-server/security/advisories/GHSA-4w32-qx5g-cpwv
vendor-advisory
-
github.com
/SignalK/signalk-server
product
-
github.com
/SignalK/signalk-server/blob/v2.32.0/src/interfaces/logfiles.js#L30-L91
technical-description
-
github.com
/SignalK/signalk-server/releases/tag/v2.33.0
release-notes
-
vulncheck.com
/advisories/signal-k-server-before-2.33.0-missing-authentication-via-skserver-ziplogs
third-party-advisory
Sources
- CVE List CVE-2026-118690
- NVD CVE-2026-118690
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