Threat Intelligence Database

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /log WebSocket route configured in config/node/api.yaml and registered by network/api/api.go does not require authentication. The first client message is parsed as a logger Profile in network/api/logs/logSender.go and applied process-wide through Profile.Apply, allowing a remote client to change global log levels and formatting options until the connection closes. The same connection is registered as a log observer and can receive live process logs. An attacker can suppress normal logs, increase verbosity, distort operator visibility, and access operational information without credentials. This issue is fixed in version 1.7.20.

CVE-2026-82406 is a high-severity vulnerability in klever-io's klever-go blockchain protocol implementation prior to version 1.7.20. The marketplace Buy function does not properly check if an NFT order is claimed before accepting bids, allowing a seller to settle an auction while leaving the order in a stale state. This can cause a later bidder to be debited without receiving the NFT or recovering funds. The issue is fixed in version 1.7.20.