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CVE-2026-54755— Klever-Go: Integer overflow in split-royalty validation enables unbounded minting of KLV (native token)

Quick assessment

Affected
klever-io klever-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Klever是Klever组织的一个高性能区块链网络，专为去中心化应用、资产管理和智能合约执行而设计。 Klever 1.7.19之前版本存在数字错误漏洞，该漏洞源于core/kapp/builtInFunctions/utils.go中split-royalty字段解码可包含大于core.HundredPercent的值，且core/kapp/kda/create.go和core/kapp/kda/trigger.go在uint32累加器中求和，特制值可使校验和回绕为零并绕过CheckValid100P

CVSS 9.6 · Critical EPSS 0.56% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
klever-io klever-go < 1.7.19 affected
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I. Basic Information for CVE-2026-54755

Vulnerability Information
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Vulnerability Title
Klever-Go: Integer overflow in split-royalty validation enables unbounded minting of KLV (native token)
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Klever 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Klever是Klever组织的一个高性能区块链网络，专为去中心化应用、资产管理和智能合约执行而设计。 Klever 1.7.19之前版本存在数字错误漏洞，该漏洞源于core/kapp/builtInFunctions/utils.go中split-royalty字段解码可包含大于core.HundredPercent的值，且core/kapp/kda/create.go和core/kapp/kda/trigger.go在uint32累加器中求和，特制值可使校验和回绕为零并绕过CheckValid100P
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
klever-io klever-go < 1.7.19 -

II. Public POCs for CVE-2026-54755

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III. Intelligence Information for CVE-2026-54755

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Vendor Advisories for CVE-2026-54755 (1)

Vendor Pages for CVE-2026-54755 (1)

Same Patch Batch · klever-io · 2026-08-28 · 4 CVEs total

CVE-2026-54754 9.6 CRITICAL Klever-Go: Marketplace settlement mints KLV when referral % + royalty % exceed the bid (ne
CVE-2026-55763 8.7 HIGH Klever-Go: Percentage-transfer royalty skips the source debit at exactly-100% splits
CVE-2026-55764 8.7 HIGH Klever-Go: SFT add-quantity `int64` overflow bypasses a finite per-nonce MaxSupply

IV. Related Vulnerabilities

Same product: klever-go
Same vendor: klever-io
Same weakness: CWE-190

V. Comments for CVE-2026-54755

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