CVE-2026-118690

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductSignalk-server

PublishedOct 28, 2026

First seenNov 4, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

SignalK signalk-server2.33.0 or later

Patches

github.com/SignalK/signalk-server/commit/728bab82742d16c54e50525b95dc9b6e32396107

Vendor advisories

Affected products

Product	Affected versions	Fixed in
SignalK signalk-server	v < 2.33.0	2.33.0

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