Klever-IO Klever-Go up to 1.7.19 Logging API logSender.go Profile.Apply missing authentication

Summaryinfo

A vulnerability was found in Klever-IO Klever-Go up to 1.7.19 and classified as critical. This issue affects the function Profile.Apply of the file network/api/logs/logSender.go of the component Logging API. The manipulation results in missing authentication. This vulnerability is reported as CVE-2026-86064. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Klever-IO Klever-Go up to 1.7.19. It has been classified as critical. Affected is the function Profile.Apply of the file network/api/logs/logSender.go of the component Logging API. The manipulation with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-86064 since 09/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

Upgrading to version 1.7.20 eliminates this vulnerability.

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Productinfo

Vendor

• Klever-IO

Name

• Klever-Go

Version

• 1.7.0
• 1.7.1
• 1.7.2
• 1.7.3
• 1.7.4
• 1.7.5
• 1.7.6
• 1.7.7
• 1.7.8
• 1.7.9
• 1.7.10
• 1.7.11
• 1.7.12
• 1.7.13
• 1.7.14
• 1.7.15
• 1.7.16
• 1.7.17
• 1.7.18
• 1.7.19

Website

• Product: https://github.com/klever-io/klever-go/

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