---
id: CVE-2026-54755
title: Klever-Go is the Go implementation of the Klever blockchain protocol
summary: >-
  Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to
  1.7.19, split-royalty fields decoded in core/kapp/builtInFunctions/utils.go
  can contain values greater than core.HundredPercent, and
  core/kapp/kda/create.go a…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H'
cwe:
  - CWE-190
vendor: klever-io
product: github.com/klever-io/klever-go
affected:
  - github.com/klever-io/klever-go < 1.7.19
patched:
  - github.com/klever-io/klever-go 1.7.19
published: '2026-08-28'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54755'
references:
  - url: >-
      https://github.com/klever-io/klever-go/commit/8bcc600b0ac88070740c63c7ce1c8a968dd85251
    label: security-advisories@github.com
  - url: 'https://github.com/klever-io/klever-go/releases/tag/v1.7.19'
    label: security-advisories@github.com
  - url: >-
      https://github.com/klever-io/klever-go/security/advisories/GHSA-cgc5-v3f2-8m2v
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-cgc5-v3f2-8m2v'
tags:
  - nvd
  - ghsa
  - go
epss: 0.0056
epssPercentile: 0.44264
aliases:
  - GHSA-cgc5-v3f2-8m2v
ecosystem: go
ingestedAt: '2026-08-28T17:22:57.146Z'
---

## Overview

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.19, split-royalty fields decoded in core/kapp/builtInFunctions/utils.go can contain values greater than core.HundredPercent, and core/kapp/kda/create.go and core/kapp/kda/trigger.go sum those values in uint32 accumulators. Crafted values such as two 0x80000000 entries wrap the validation sum to zero and pass CheckValid100Params. Royalty payout paths in core/kapp/accounts/accounts.go, core/kapp/market/market.go, and core/kapp/ito/ito.go then credit each oversized split amount and silently discard a negative remainder, allowing ordinary asset transfers, marketplace purchases, or ITO purchases to create unbacked KLV or other assets. This issue is fixed in version 1.7.19.

## Remediation

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

## Package advisory (CVE-2026-54755)

Affected packages:

- `github.com/klever-io/klever-go < 1.7.19`

Patched in:

- `github.com/klever-io/klever-go 1.7.19`

Source: https://github.com/advisories/GHSA-cgc5-v3f2-8m2v