High 8.6Published Sep 23, 2026

CVE-2026-86064Klever-Go: /log controls global node logging

Updated under an hour ago (2026-10-19 07:30 UTC)

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Every CVE for klever-io klever-go

Exploited in the last 30 days

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.

CVSS: 8.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Weakness (CWE): CWE-200, CWE-306
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

klever-io klever-go klever_io:klever_go (from the name)	before 1.7.20	CNA record

References

https://github.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcmx-refsource-confirm
https://github.com/klever-io/klever-go/pull/74x-refsource-misc
https://github.com/klever-io/klever-go/commit/a2740c985a788fb69e17742ea4f0c37c440733b2x-refsource-misc
https://github.com/klever-io/klever-go/releases/tag/v1.7.20x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.