CVE-2026-86064

Description

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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: HIGH
CVSS score: 8.6 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Effective score: 8.6 / 10 HIGH source: CNA overview
CWE(s): CWE-200, CWE-306
Reserved: 2026-09-04
Published: 2026-09-23 19:12 UTC
Last updated: 2026-09-23 19:29 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/86xxx/CVE-2026-86064.json
Linked Threat: CVE-2026-86064 — Klever-Go: /log controls global node logging

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 20:17:19 UTC
NVD last modified: 2026-09-23 20:17:20 UTC
NVD CVSS v3.1: 8.6 / 10 HIGH source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Exploitability subscore: 3.9 / 10
Impact subscore: 4.7 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85574
Assigner: GitHub_M
Published: Sep 23, 2026, 7:12:51 PM
Updated: Sep 23, 2026, 7:29:31 PM
EUVD base score (CVSS 3.1): 8.6 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
EUVD-reported EPSS: 0.0000
Vendors: klever-io
Products: klever-go (< 1.7.20)
Aliases: GHSA-9v8p-frvj-2pcm

ENISA description: 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.

EUVD references (4)

Affected products (1)

Vendor	Product	Versions	Platforms
klever-io	klever-go	`< 1.7.20` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

https://github.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcm x_refsource_CONFIRM
https://github.com/klever-io/klever-go/pull/74 x_refsource_MISC
https://github.com/klever-io/klever-go/commit/a2740c985a788fb69e17742ea4f0c37c440733b2 x_refsource_MISC
https://github.com/klever-io/klever-go/releases/tag/v1.7.20 x_refsource_MISC

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/klever-io/klever-go/commit/a2740c985a788fb69e17742ea4f0c37c440733b2 security-advisories@github.com
https://github.com/klever-io/klever-go/pull/74 security-advisories@github.com
https://github.com/klever-io/klever-go/releases/tag/v1.7.20 security-advisories@github.com
https://github.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcm security-advisories@github.com
https://github.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcm 134c704f-9b21-4f2e-91b3-4a467353bcc0

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Microsoft's September 2026 Patch Tuesday addresses 964 CVEs (CVE-2026 ...

web:connect.tenable.com

On September 8, Microsoft released its September 2026 Patch Tuesday release which patched 964 CVEs with 104 rated critical and 860 rated as important. This update includes patches for two zero-days that were exploited in the wild.

2026-09-24 11:11 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-24 11:11 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:11 UTC
SAP Security Patch Day - June 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-24 11:11 UTC
August 2026 CVE Advisory Notification - Security

web:support.servicenow.com

Due to additional analysis provided by the security researcher who discovered CVE - 2026 -6876, we have upgraded the severity rating of CVE - 2026 -6876 from High to Critical. This change affects only the severity

2026-09-24 11:11 UTC
CISA Adds One Known Exploited Vulnerability to Catalog

web:www.cisa.gov

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE - 2026 -85706 GitLab Community Edition and Enterprise Edition Path Traversal Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber ...

2026-09-24 11:11 UTC
Security Bulletin: Vulnerabilities have been identified in ... - IBM

web:www.ibm.com

WebSphere Application Server is shipped as a component of WebSphere Service Registry and Repository. Information about multiple vulnerabilities affecting WebSphere Application Server have been published in security bulletins.

2026-09-24 11:11 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-24 11:11 UTC
Oracle Critical Security Patch Update Advisory - June 2026

web:www.oracle.com

Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...

2026-09-24 11:11 UTC
Google Patches 6th Chrome Zero-Day of 2026 - SecurityWeek

web:www.securityweek.com

Google on Thursday rolled out fresh Chrome 152 security updates that resolve 12 vulnerabilities, including an exploited zero-day. Tracked as CVE - 2026 -85046, the high-severity bug is described as a type confusion issue in Chrome's V8 JavaScript and WebAssembly engine. It was reported by Salvatore Gulizia, who received a $1,000 bug bounty reward. "Google is aware that an exploit for CVE-2026 ...

2026-09-24 11:11 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-86064.json.

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