---
id: CVE-2026-52880
title: Klever-Go is the Go implementation of the Klever blockchain protocol
summary: >-
  Klever-Go is the Go implementation of the Klever blockchain protocol. Versions
  from 1.7.14 through 1.7.17 are vulnerable to a remotely triggerable denial of
  service. Both REST APIs are started with the Gin Engine.Run convenience
  method, …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
published: '2026-08-07'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:55:04.493'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52880'
references:
  - url: 'https://github.com/klever-io/klever-go/releases/tag/v1.7.18'
    label: security-advisories@github.com
  - url: >-
      https://github.com/klever-io/klever-go/security/advisories/GHSA-w4c6-7r69-w7j9
    label: security-advisories@github.com
  - url: >-
      https://github.com/klever-io/klever-go/security/advisories/GHSA-w4c6-7r69-w7j9
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00349
epssPercentile: 0.28582
ingestedAt: '2026-09-09T21:22:45.526Z'
---

## Overview

Klever-Go is the Go implementation of the Klever blockchain protocol. Versions from 1.7.14 through 1.7.17 are vulnerable to a remotely triggerable denial of service. Both REST APIs are started with the Gin Engine.Run convenience method, which serves requests through Go's default HTTP server with no ReadHeaderTimeout, ReadTimeout, or MaxHeaderBytes configured. As a result, incoming connections that never complete their request headers are held open indefinitely. When a REST listener is reachable beyond localhost through the documented all-interface bind or a Docker port-publish deployment, a single unauthenticated client can open many slow-header connections and hold them open until server file descriptors are exhausted, preventing the API from accepting new connections. This renders the REST API unavailable to legitimate clients. This issue is fixed in version 1.7.18.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.